/*****************************
 * extjscsienricher v. 1.4.1 *
 *****************************/


/****************************************************************
  *                                                              *
  *  CurvyCorners                                                *
  *  ------------                                                *
  *                                                              *
  *  This script generates rounded corners for your boxes.       *
  *                                                              *
  *  Version 2.0.4                                               *
  *  Copyright (c) 2009 Cameron Cooke                            *
  *  Contributors: Tim Hutchison, CPK Smithies, Terry Rigel      *
  *                                                              *
  *  Website: http://www.curvycorners.net                        *
  *  SVN:     http://curvycorners.googlecode.com/                *
  *  Email:   cameron@curvycorners.net                           *
  *  Discuss: http://groups.google.com/group/curvycorners        *
  *                                                              *
  *  Please consult the SVN for a list of changes since the last *
  *  revision.                                                   *
  *                                                              *
  *  This library is free software; you can redistribute         *
  *  it and/or modify it under the terms of the GNU              *
  *  Lesser General Public License as published by the           *
  *  Free Software Foundation; either version 2.1 of the         *
  *  License, or (at your option) any later version.             *
  *                                                              *
  *  This library is distributed in the hope that it will        *
  *  be useful, but WITHOUT ANY WARRANTY; without even the       *
  *  implied warranty of MERCHANTABILITY or FITNESS FOR A        *
  *  PARTICULAR PURPOSE. See the GNU Lesser General Public       *
  *  License for more details.                                   *
  *                                                              *
  *  You should have received a copy of the GNU Lesser           *
  *  General Public License along with this library;             *
  *  Inc., 59 Temple Place, Suite 330, Boston,                   *
  *  MA 02111-1307 USA                                           *
  *                                                              *
  ****************************************************************/

/**
*Version 2.x now autoMagically applies borders via CSS rules.
*Safari, Chrome and Mozilla support rounded borders via
*
<pre></code>
-webkit-border-radius, -moz-border-radius
</code></pre>
*
*We let these browsers render their borders natively.
*Firefox for Windows renders non-antialiased
*borders so they look a bit ugly. Google's Chrome will render its "ugly"
*borders as well. So if we let FireFox, Safari, and Chrome render their
*borders natively, then we only have to support IE and Opera
*for rounded borders. Fortunately IE reads CSS properties
*that it doesn't understand (Opera, Firefox and Safari discard them);
*so for IE and Opera we find and apply -webkit-border-radius and friends.
*
*So to make curvycorners work with any major browser simply add the following
*CSS declarations and it should be good to go...
<pre></code>
.round {
  -webkit-border-radius: 3ex;
  -moz-border-radius: 3ex;
}
</code></pre>
*NB at present you must (for Opera's sake) include these styles in
*the page itself.
*Usage:
<pre></code>
curvyCorners(settingsObj, selectorStr);
curvyCorners(settingsObj, Obj1[, Obj2[, Obj3[, . . . [, ObjN]]]]);

selectorStr ::= complexSelector [, complexSelector]...
complexSelector ::= singleSelector[ singleSelector]
singleSelector ::= idType | classType
idType ::= #id
classType ::= [tagName].className
tagName ::= div|p|form|blockquote|frameset // others may work
    className : .name
    selector examples:
      #mydiv p.rounded
      #mypara
      .rounded
</code></pre>
*esempio di invocazione dell'estensione csi del plugin:
*
<pre></code>
var round = new ExtCsi.corner.RoundCorner({
	settings : {
		tl: { radius: 4 },
      	tr: { radius: 4 },
      	bl: { radius: 4 },
      	br: { radius: 4 },
      	antiAlias: true
	},
	divElement : 'h1,h3,h4'
	}
);
</code></pre>
*/

/**
 * @class ExtCsi.corner
 * @singleton
 */
Ext.ns("ExtCsi.corner");

/**
 * funzione per arrotondare gli angoli
 * @param {Object} rappresenta la configurazione da passare
 */
ExtCsi.corner.RoundCorner = function(config) {
	
	var corn = curvyCorners(config.settings, config.divElement);
	
	
}

/**
 * funzione per ondividuare la versione del browser
 * @return {object} l'oggetto che espone gli attributi:
 * <ul>
 * <li><b>isIE</b> : Boolean che indica se il browser corrente è Internet Explorer</li>
 * <li><b>ieVer</b> : Number che indica se la versione di Internet Explorer
 * <li><b>isMoz</b> : Boolean che indica se il browser corrente è firefox</li>
 * <li><b>isSafari</b> : Boolean che indica se il browser corrente è safari</li>
 * <li><b>isOp</b> : Boolean che indica se il browser corrente è opera</li>
 * <li><b>isWebKit</b> : Boolean che indica se il browser usa WebKit</li>
 * </ul>
 */
function browserdetect() {
  var agent = navigator.userAgent.toLowerCase();
  this.isIE      = agent.indexOf("msie") > -1;
  this.ieVer = this.isIE ? /msie\s(\d\.\d)/.exec(agent)[1] : 0;
  this.isMoz     = agent.indexOf('firefox') != -1;
  this.isSafari  = agent.indexOf('safari') != -1;
  this.quirksMode= this.isIE && (!document.compatMode || document.compatMode.indexOf("BackCompat") > -1);
  this.isOp      = 'opera' in window;
  this.isWebKit  = agent.indexOf('webkit') != -1;
  if (this.isIE) {
    this.get_style = function(obj, prop) {
      if (!(prop in obj.currentStyle)) return "";
      var matches = /^([\d.]+)(\w*)/.exec(obj.currentStyle[prop]);
      if (!matches) return obj.currentStyle[prop];
      if (matches[1] == 0) return '0';
      // now convert to pixels if necessary
      if (matches[2] && matches[2] !== 'px') {
        var style = obj.style.left;
        var rtStyle = obj.runtimeStyle.left;
        obj.runtimeStyle.left = obj.currentStyle.left;
        obj.style.left = matches[1] + matches[2];
        matches[0] = obj.style.pixelLeft;
        obj.style.left = style;
        obj.runtimeStyle.left = rtStyle;
      }
      return matches[0];
    };
  }
  else {
    this.get_style = function(obj, prop) {
      prop = prop.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
      return document.defaultView.getComputedStyle(obj, '').getPropertyValue(prop);
    };
  }
}
var curvyBrowser = new browserdetect;

/* Force caching of bg images in IE6 */
if (curvyBrowser.isIE) {
  try {
    document.execCommand("BackgroundImageCache", false, true);
  }
  catch(e) {};
}

/**
 * object that parses border-radius properties for a box
 * @param {String} selText
 * @return {Object}
 */
function curvyCnrSpec(selText) {
  this.selectorText = selText;
  this.tlR = this.trR = this.blR = this.brR = 0;
  this.tlu = this.tru = this.blu = this.bru = "";
  this.antiAlias = true; // default true
}

/**
 * setta gli angoli
 * @param {String}
 * @param {String}
 * @param {String}
 * @param {String}
 * @return {Object}
 */
curvyCnrSpec.prototype.setcorner = function(tb, lr, radius, unit) {
  if (!tb) { // no corner specified
    this.tlR = this.trR = this.blR = this.brR = parseInt(radius);
    this.tlu = this.tru = this.blu = this.bru = unit;
  }
  else { // corner specified
    propname = tb.charAt(0) + lr.charAt(0);
    this[propname + 'R'] = parseInt(radius);
    this[propname + 'u'] = unit;
  }
}

/**
 * @param {String}
 * <pre><code>
  get(propstring)
  where propstring is:
  - 'tR' or 'bR' : returns top or bottom radius.
  - 'tlR', 'trR', 'blR' or 'brR' : returns top/bottom left/right radius.
  - 'tlu', 'tru', 'blr' or 'bru' : returns t/b l/r unit (px, em...)
  - 'tRu' or 'bRu' : returns top/bottom radius+unit
  - 'tlRu', 'trRu', 'blRu', 'brRu' : returns t/b l/r radius+unit
  </pre></code>
*/
curvyCnrSpec.prototype.get = function(prop) {
  if (/^(t|b)(l|r)(R|u)$/.test(prop)) return this[prop];
  if (/^(t|b)(l|r)Ru$/.test(prop)) {
    var pname = prop.charAt(0) + prop.charAt(1);
    return this[pname + 'R'] + this[pname + 'u'];
  }
  if (/^(t|b)Ru?$/.test(prop)) {
    var tb = prop.charAt(0);
    tb += this[tb + 'lR'] > this[tb + 'rR'] ? 'l' : 'r';
    var retval = this[tb + 'R'];
    if (prop.length === 3 && prop.charAt(2) === 'u')
      retval += this[tb = 'u'];
    return retval;
  }
  throw new Error('Don\'t recognize property ' + prop);
}

/**
 * private
 */
curvyCnrSpec.prototype.radiusdiff = function(tb) {
  if (tb !== 't' && tb !== 'b') throw new Error("Param must be 't' or 'b'");
  return Math.abs(this[tb + 'lR'] - this[tb + 'rR']);
}

//private
curvyCnrSpec.prototype.setfrom = function(obj) {
  this.tlu = this.tru = this.blu = this.bru = 'px'; // default to px
  if ('tl' in obj) this.tlR = obj.tl.radius;
  if ('tr' in obj) this.trR = obj.tr.radius;
  if ('bl' in obj) this.blR = obj.bl.radius;
  if ('br' in obj) this.brR = obj.br.radius;
  if ('antiAlias' in obj) this.antiAlias = obj.antiAlias;
};

// private
curvyCnrSpec.prototype.cloneOn = function(box) { // not needed by IE
  var props = ['tl', 'tr', 'bl', 'br'];
  var converted = 0;
  var i, propu;

  for (i in props) if (!isNaN(i)) {
    propu = this[props[i] + 'u'];
    if (propu !== '' && propu !== 'px') {
      converted = new curvyCnrSpec;
      break;
    }
  }
  if (!converted)
    converted = this; // no need to clone
  else {
    var propi, propR, save = curvyBrowser.get_style(box, 'left');
    for (i in props) if (!isNaN(i)) {
      propi = props[i];
      propu = this[propi + 'u'];
      propR = this[propi + 'R'];
      if (propu !== 'px') {
        var save = box.style.left;
        box.style.left = propR + propu;
        propR = box.style.pixelLeft;
        box.style.left = save;
      }
      converted[propi + 'R'] = propR;
      converted[propi + 'u'] = 'px';
    }
    box.style.left = save;
  }
  return converted;
}
curvyCnrSpec.prototype.radiusSum = function(tb) {
  if (tb !== 't' && tb !== 'b') throw new Error("Param must be 't' or 'b'");
  return this[tb + 'lR'] + this[tb + 'rR'];
}
curvyCnrSpec.prototype.radiusCount = function(tb) {
  var count = 0;
  if (this[tb + 'lR']) ++count;
  if (this[tb + 'rR']) ++count;
  return count;
}
curvyCnrSpec.prototype.cornerNames = function() {
  var ret = [];
  if (this.tlR) ret.push('tl');
  if (this.trR) ret.push('tr');
  if (this.blR) ret.push('bl');
  if (this.brR) ret.push('br');
  return ret;
}

/**
 * @param {String}
 * Object that parses Opera CSS 
 *
*/
function operasheet(sheetnumber) {
  var txt = document.styleSheets.item(sheetnumber).ownerNode.text;
  txt = txt.replace(/\/\*(\n|\r|.)*?\*\//g, ''); // strip comments
  // this pattern extracts all border-radius-containing rulesets
  // matches will be:
  // [0] = the whole lot
  // [1] = the selector text
  // [2] = all the rule text between braces
  // [3] = top/bottom and left/right parts if present (only if webkit/CSS3)
  // [4] = top|bottom
  // [5] = left|right
  // .. but 3..5 are useless as they're only the first match.
  var pat = new RegExp("^\s*([\\w.#][-\\w.#, ]+)[\\n\\s]*\\{([^}]+border-((top|bottom)-(left|right)-)?radius[^}]*)\\}", "mg");
  var matches;
  this.rules = [];
  while ((matches = pat.exec(txt)) !== null) {
    var pat2 = new RegExp("(..)border-((top|bottom)-(left|right)-)?radius:\\s*([\\d.]+)(in|em|px|ex|pt)", "g");
    var submatches, cornerspec = new curvyCnrSpec(matches[1]);
    while ((submatches = pat2.exec(matches[2])) !== null)
      if (submatches[1] !== "z-")
        cornerspec.setcorner(submatches[3], submatches[4], submatches[5], submatches[6]);
    this.rules.push(cornerspec);
  }
}
/**
 * @param {String}
 * static class function to determine if the sheet is worth parsing
 */
operasheet.contains_border_radius = function(sheetnumber) {
  return /border-((top|bottom)-(left|right)-)?radius/.test(document.styleSheets.item(sheetnumber).ownerNode.text);
}

/**
 * @param {Object}
 * @param {String}
*Usage:
<pre><code>
  curvyCorners(settingsObj, "selectorStr");
  curvyCorners(settingsObj, domObj1[, domObj2[, domObj3[, . . . [, domObjN]]]]);
  selectorStr::= "<complexSelector>[, <complexSelector>]..."
  complexSelector::= <selector>[ <selector]
  selector::= "[<elementname>].classname" | "#id"
  </pre></code>
*/

function curvyCorners() {
  var i, j, boxCol, settings, startIndex;
  // Check parameters
  if (typeof arguments[0] !== "object") throw curvyCorners.newError("First parameter of curvyCorners() must be an object.");
  if (arguments[0] instanceof curvyCnrSpec) {
    settings = arguments[0];
    if (!settings.selectorText && typeof arguments[1] === 'string')
      settings.selectorText = arguments[1];
  }
  else {
    if (typeof arguments[1] !== "object" && typeof arguments[1] !== "string") throw curvyCorners.newError("Second parameter of curvyCorners() must be an object or a class name.");
    j = arguments[1];
    if (typeof j !== 'string') j = '';
    if (j !== '' && j.charAt(0) !== '.' && 'autoPad' in arguments[0]) j = '.' + j; // for compatibility, prefix with dot
    settings = new curvyCnrSpec(j);
    settings.setfrom(arguments[0]);
  }

  // Get object(s)
  if (settings.selectorText) {
    startIndex = 0;
    var args = settings.selectorText.replace(/\s+$/,'').split(/,\s*/); // handle comma-separated selector list
    boxCol = new Array;

    // converts div#mybox to #mybox
    function idof(str) {
      var ret = str.split('#');
      return (ret.length === 2 ? "#" : "") + ret.pop();
    }

    for (i = 0; i < args.length; ++i) {
      var arg = idof(args[i]);
      var argbits = arg.split(' ');
      switch (arg.charAt(0)) {
        case '#' : // id
          j = argbits.length === 1 ? arg : argbits[0];
          j = document.getElementById(j.substr(1));
          if (j === null)
            curvyCorners.alert("No object with ID " + arg + " exists yet.\nCall curvyCorners(settings, obj) when it is created.");
          else if (argbits.length === 1)
            boxCol.push(j);
          else
            boxCol = boxCol.concat(curvyCorners.getElementsByClass(argbits[1], j));
        break;
        default :
          if (argbits.length === 1)
            boxCol = boxCol.concat(curvyCorners.getElementsByClass(arg));
          else {
            var encloser = curvyCorners.getElementsByClass(argbits[0]);
            for (j = 0; j < encloser.length; ++j) {
              boxCol = boxCol.concat(curvyCorners.getElementsByClass(argbits[1], encloser));
            }
          }
        //break;
      }
    }
  }
  else {
    // Get objects
    startIndex = 1;
    boxCol = arguments;
  }

  // Loop through each argument
  for (i = startIndex, j = boxCol.length; i < j; ++i) {
    if (boxCol[i] && (!('IEborderRadius' in boxCol[i].style) || boxCol[i].style.IEborderRadius != 'set')) {
      if (boxCol[i].className && boxCol[i].className.indexOf('curvyRedraw') !== -1) {
        if (typeof curvyCorners.redrawList === 'undefined') curvyCorners.redrawList = new Array;
        curvyCorners.redrawList.push({
          node : boxCol[i],
          spec : settings,
          copy : boxCol[i].cloneNode(false)
        });
      }
      boxCol[i].style.IEborderRadius = 'set';
      var obj = new curvyObject(settings, boxCol[i]);
      obj.applyCorners();
    }
  }
}

// private
curvyCorners.prototype.applyCornersToAll = function () { // now redundant
  curvyCorners.alert('This function is now redundant. Just call curvyCorners(). See documentation.');
};

//private
curvyCorners.redraw = function() {
  if (!curvyBrowser.isOp && !curvyBrowser.isIE) return;
  if (!curvyCorners.redrawList) throw curvyCorners.newError('curvyCorners.redraw() has nothing to redraw.');
  var old_block_value = curvyCorners.bock_redraw;
  curvyCorners.block_redraw = true;
  for (var i in curvyCorners.redrawList) {
    if (isNaN(i)) continue; // in case of added prototype methods
    var o = curvyCorners.redrawList[i];
    if (!o.node.clientWidth) continue; // don't resize hidden boxes
    var newchild = o.copy.cloneNode(false);
    for (var contents = o.node.firstChild; contents != null; contents = contents.nextSibling)
      if (contents.className === 'autoPadDiv') break;
    if (!contents) {
      curvyCorners.alert('Couldn\'t find autoPad DIV');
      break;
    }
    o.node.parentNode.replaceChild(newchild, o.node);
    while (contents.firstChild) newchild.appendChild(contents.removeChild(contents.firstChild));
    o = new curvyObject(o.spec, o.node = newchild);
    o.applyCorners();
  }
  curvyCorners.block_redraw = old_block_value;
}

//private
curvyCorners.adjust = function(obj, prop, newval) {
  if (curvyBrowser.isOp || curvyBrowser.isIE) {
    if (!curvyCorners.redrawList) throw curvyCorners.newError('curvyCorners.adjust() has nothing to adjust.');
    var i, j = curvyCorners.redrawList.length;
    for (i = 0; i < j; ++i) if (curvyCorners.redrawList[i].node === obj) break;
    if (i === j) throw curvyCorners.newError('Object not redrawable');
    obj = curvyCorners.redrawList[i].copy;
  }
  if (prop.indexOf('.') === -1)
    obj[prop] = newval;
  else eval('obj.' + prop + "='" + newval + "'");
}
curvyCorners.handleWinResize = function() {
  if (!curvyCorners.block_redraw) curvyCorners.redraw();
}
curvyCorners.setWinResize = function(onoff) {
  curvyCorners.block_redraw = !onoff;
}
curvyCorners.newError = function(errorMessage) {
  return new Error("curvyCorners Error:\n" + errorMessage)
}
curvyCorners.alert = function(errorMessage) {
  if (typeof curvyCornersVerbose === 'undefined' || curvyCornersVerbose) alert(errorMessage);
}

/**
 * @param {Object}
 * @param {String}
 * curvyCorners object (can be called directly)
 */
function curvyObject() {
  var boxDisp;
  this.box              = arguments[1];
  this.settings         = arguments[0];
  this.topContainer = this.bottomContainer = this.shell = boxDisp = null;
  var boxWidth = this.box.clientWidth; // browser-independent IE-emulation (NB includes padding)

  // if no client width, maybe the box or a parent has 'display:none'.

  if (!boxWidth && curvyBrowser.isIE) {
    this.box.style.zoom = 1; // can force IE to calculate width
    boxWidth = this.box.clientWidth;
  }
  if (!boxWidth) {
    if (!this.box.parentNode) throw this.newError("box has no parent!"); // unlikely...
    for (boxDisp = this.box; ; boxDisp = boxDisp.parentNode) {
      if (!boxDisp || boxDisp.tagName === 'BODY') { // we've hit the buffers
        this.applyCorners = function() {} // make the error benign
        curvyCorners.alert(this.errmsg("zero-width box with no accountable parent", "warning"));
        return;
      }
      if (boxDisp.style.display === 'none') break;
    }
    // here, we've found the box whose display is set to 'none'.
    boxDisp.style.display = 'block'; // display in order to get browser to calculate clientWidth
    boxWidth = this.box.clientWidth;
  }
  if (arguments[0] instanceof curvyCnrSpec)
    this.spec = arguments[0].cloneOn(this.box); // convert non-pixel units
  else {
    this.spec = new curvyCnrSpec('');
    this.spec.setfrom(this.settings); // no need for unit conversion, use settings param. directly
  }

  // Get box formatting details
  var borderWidth     = curvyBrowser.get_style(this.box, "borderTopWidth");
  var borderWidthB    = curvyBrowser.get_style(this.box, "borderBottomWidth");
  var borderWidthL    = curvyBrowser.get_style(this.box, "borderLeftWidth");
  var borderWidthR    = curvyBrowser.get_style(this.box, "borderRightWidth");
  var borderColour    = curvyBrowser.get_style(this.box, "borderTopColor");
  var borderColourB   = curvyBrowser.get_style(this.box, "borderBottomColor");
  var borderColourL   = curvyBrowser.get_style(this.box, "borderLeftColor");
  var boxColour       = curvyBrowser.get_style(this.box, "backgroundColor");
  var backgroundImage = curvyBrowser.get_style(this.box, "backgroundImage");
  var backgroundRepeat= curvyBrowser.get_style(this.box, "backgroundRepeat");
  if (this.box.currentStyle && this.box.currentStyle.backgroundPositionX) {
  var backgroundPosX  = curvyBrowser.get_style(this.box, "backgroundPositionX");
  var backgroundPosY  = curvyBrowser.get_style(this.box, "backgroundPositionY");
  }
  else {
    var backgroundPosX = curvyBrowser.get_style(this.box, 'backgroundPosition');
    backgroundPosX = backgroundPosX.split(' ');
    var backgroundPosY = backgroundPosX[1];
    backgroundPosX = backgroundPosX[0];
  }
  var boxPosition     = curvyBrowser.get_style(this.box, "position");
  var topPadding      = curvyBrowser.get_style(this.box, "paddingTop");
  var bottomPadding   = curvyBrowser.get_style(this.box, "paddingBottom");
  var leftPadding     = curvyBrowser.get_style(this.box, "paddingLeft");
  var rightPadding    = curvyBrowser.get_style(this.box, "paddingRight");
  var border          = curvyBrowser.get_style(this.box, "border");
  filter = curvyBrowser.ieVer > 7 ? curvyBrowser.get_style(this.box, 'filter') : null; // IE8 bug fix

  var topMaxRadius    = this.spec.get('tR');
  var botMaxRadius    = this.spec.get('bR');
  var styleToNPx = function(val) {
    if (typeof val === 'number') return val;
    if (typeof val !== 'string') throw new Error('unexpected styleToNPx type ' + typeof val);
    var matches = /^[-\d.]([a-z]+)$/.exec(val);
    if (matches && matches[1] != 'px') throw new Error('Unexpected unit ' + matches[1]);
    if (isNaN(val = parseInt(val))) val = 0;
    return val;
  }
  var min0Px = function(val) {
    return val <= 0 ? "0" : val + "px";
  }

  // Set formatting properties
  try {
    this.borderWidth     = styleToNPx(borderWidth);
    this.borderWidthB    = styleToNPx(borderWidthB);
    this.borderWidthL    = styleToNPx(borderWidthL);
    this.borderWidthR    = styleToNPx(borderWidthR);
    this.boxColour       = curvyObject.format_colour(boxColour);
    this.topPadding      = styleToNPx(topPadding);
    this.bottomPadding   = styleToNPx(bottomPadding);
    this.leftPadding     = styleToNPx(leftPadding);
    this.rightPadding    = styleToNPx(rightPadding);
    this.boxWidth        = boxWidth;
    this.boxHeight       = this.box.clientHeight;
    this.borderColour    = curvyObject.format_colour(borderColour);
    this.borderColourB   = curvyObject.format_colour(borderColourB);
    this.borderColourL   = curvyObject.format_colour(borderColourL);
    this.borderString    = this.borderWidth + "px" + " solid " + this.borderColour;
    this.borderStringB   = this.borderWidthB + "px" + " solid " + this.borderColourB;
    this.backgroundImage = ((backgroundImage != "none")? backgroundImage : "");
    this.backgroundRepeat= backgroundRepeat;
  }
  catch(e) {
    throw this.newError('getMessage' in e ? e.getMessage() : e.message);
  }
  var clientHeight = this.boxHeight;
  var clientWidth = boxWidth; // save it as it gets trampled on later
  if (curvyBrowser.isOp) {
    backgroundPosX = styleToNPx(backgroundPosX);
    backgroundPosY = styleToNPx(backgroundPosY);
    if (backgroundPosX) {
      var t = clientWidth + this.borderWidthL + this.borderWidthR;
      if (backgroundPosX > t) backgroundPosX = t;
      backgroundPosX = (t / backgroundPosX * 100) + '%'; // convert to percentage
    }
    if (backgroundPosY) {
      var t = clientHeight + this.borderWidth + this.borderWidthB;
      if (backgroundPosY > t) backgroundPosY = t;
      backgroundPosY = (t / backgroundPosY * 100) + '%'; // convert to percentage
    }
  }
  if (curvyBrowser.quirksMode) {
  }
  else {
    this.boxWidth -= this.leftPadding + this.rightPadding;
    this.boxHeight -= this.topPadding + this.bottomPadding;
  }

  // Create content container
  this.contentContainer = document.createElement("div");
  if (filter) this.contentContainer.style.filter = filter; // IE8 bug fix
  while (this.box.firstChild) this.contentContainer.appendChild(this.box.removeChild(this.box.firstChild));

  if (boxPosition != "absolute") this.box.style.position = "relative";
  this.box.style.padding = '0';
  this.box.style.border = this.box.style.backgroundImage = 'none';
  this.box.style.backgroundColor = 'transparent';

  this.box.style.width   = (clientWidth + this.borderWidthL + this.borderWidthR) + 'px';
  this.box.style.height  = (clientHeight + this.borderWidth + this.borderWidthB) + 'px';

  // Ok we add an inner div to actually put things into this will allow us to keep the height

  var newMainContainer = document.createElement("div");
  newMainContainer.style.position = "absolute";
  if (filter) newMainContainer.style.filter = filter; // IE8 bug fix
  if (curvyBrowser.quirksMode) {
    newMainContainer.style.width  = (clientWidth + this.borderWidthL + this.borderWidthR) + 'px';
  } else {
    newMainContainer.style.width  = clientWidth + 'px';
  }
  newMainContainer.style.height = min0Px(clientHeight + this.borderWidth + this.borderWidthB - topMaxRadius - botMaxRadius);
  newMainContainer.style.padding  = "0";
  newMainContainer.style.top    = topMaxRadius + "px";
  newMainContainer.style.left   = "0";
  if (this.borderWidthL)
    newMainContainer.style.borderLeft = this.borderWidthL + "px solid " + this.borderColourL;
  if (this.borderWidth && !topMaxRadius)
    newMainContainer.style.borderTop = this.borderWidth + "px solid " + this.borderColour;
  if (this.borderWidthR)
    newMainContainer.style.borderRight = this.borderWidthR + "px solid " + this.borderColourL;
  if (this.borderWidthB && !botMaxRadius)
    newMainContainer.style.borderBottom = this.borderWidthB + "px solid " + this.borderColourB;
  newMainContainer.style.backgroundColor    = boxColour;
  newMainContainer.style.backgroundImage    = this.backgroundImage;
  newMainContainer.style.backgroundRepeat   = this.backgroundRepeat;
  this.shell = this.box.appendChild(newMainContainer);

  boxWidth = curvyBrowser.get_style(this.shell, "width");
  if (boxWidth === "" || boxWidth === "auto" || boxWidth.indexOf("%") !== -1) throw this.newError('Shell width is ' + boxWidth);
  this.boxWidth = (boxWidth != "" && boxWidth != "auto" && boxWidth.indexOf("%") == -1) ? parseInt(boxWidth) : this.shell.clientWidth;

  /*
    This method creates the corners and
    applies them to the div element.
  */
  this.applyCorners = function() {
    /*
      Set up background offsets. This may need to be delayed until
      the background image is loaded.
    */
    if (this.backgroundObject) {
      var bgOffset = function(style, imglen, boxlen) {
        if (style === 0) return 0;
        var retval;
        if (style === 'right' || style === 'bottom') return boxlen - imglen;
        if (style === 'center') return (boxlen - imglen) / 2;
        if (style.indexOf('%') > 0) return (boxlen - imglen) * 100 / parseInt(style);
        return styleToNPx(style);
      }
      this.backgroundPosX  = bgOffset(backgroundPosX, this.backgroundObject.width, clientWidth);
      this.backgroundPosY  = bgOffset(backgroundPosY, this.backgroundObject.height, clientHeight);
    }
    else if (this.backgroundImage) {
      this.backgroundPosX = styleToNPx(backgroundPosX);
      this.backgroundPosY = styleToNPx(backgroundPosY);
    }
    /*
      Create top and bottom containers.
      These will be used as a parent for the corners and bars.
    */
    // Build top bar only if a top corner is to be drawn
    if (topMaxRadius) {
      newMainContainer = document.createElement("div");
      newMainContainer.style.width = this.boxWidth + "px";
      newMainContainer.style.fontSize = "1px";
      newMainContainer.style.overflow = "hidden";
      newMainContainer.style.position = "absolute";
      newMainContainer.style.paddingLeft  = this.borderWidth + "px";
      newMainContainer.style.paddingRight = this.borderWidth + "px";
      newMainContainer.style.height = topMaxRadius + "px";
      newMainContainer.style.top    = -topMaxRadius + "px";
      newMainContainer.style.left   = -this.borderWidthL + "px";
      this.topContainer = this.shell.appendChild(newMainContainer);
    }
    // Build bottom bar only if a bottom corner is to be drawn
    if (botMaxRadius) {
      var newMainContainer = document.createElement("div");
      newMainContainer.style.width = this.boxWidth + "px";
      newMainContainer.style.fontSize = "1px";
      newMainContainer.style.overflow = "hidden";
      newMainContainer.style.position = "absolute";
      newMainContainer.style.paddingLeft  = this.borderWidthB + "px";
      newMainContainer.style.paddingRight = this.borderWidthB + "px";
      newMainContainer.style.height   =  botMaxRadius + "px";
      newMainContainer.style.bottom   = -botMaxRadius + "px";
      newMainContainer.style.left     = -this.borderWidthL + "px";
      this.bottomContainer = this.shell.appendChild(newMainContainer);
    }

    var corners = this.spec.cornerNames();  // array of available corners

    /*
    Loop for each corner
    */
    for (var i in corners) if (!isNaN(i)) {
      // Get current corner type from array
      var cc = corners[i];
      var specRadius = this.spec[cc + 'R'];
      // Has the user requested the currentCorner be round?
      // Code to apply correct color to top or bottom
      var bwidth, bcolor, borderRadius, borderWidthTB;
      if (cc == "tr" || cc == "tl") {
        bwidth = this.borderWidth;
        bcolor = this.borderColour;
        borderWidthTB = this.borderWidth;
      } else {
        bwidth = this.borderWidthB;
        bcolor = this.borderColourB;
        borderWidthTB = this.borderWidthB;
      }
      borderRadius = specRadius - borderWidthTB;
      var newCorner = document.createElement("div");
      newCorner.style.height = this.spec.get(cc + 'Ru');
      newCorner.style.width  = this.spec.get(cc + 'Ru');
      newCorner.style.position = "absolute";
      newCorner.style.fontSize = "1px";
      newCorner.style.overflow = "hidden";
      // THE FOLLOWING BLOCK OF CODE CREATES A ROUNDED CORNER
      // ---------------------------------------------------- TOP
      var intx, inty, outsideColour;
      var trans = filter ? parseInt(/alpha\(opacity.(\d+)\)/.exec(filter)[1]) : 100; // IE8 bug fix
      // Cycle the x-axis
      for (intx = 0; intx < specRadius; ++intx) {
        // Calculate the value of y1 which identifies the pixels inside the border
        var y1 = (intx + 1 >= borderRadius) ? -1 : Math.floor(Math.sqrt(Math.pow(borderRadius, 2) - Math.pow(intx + 1, 2))) - 1;
        // Calculate y2 and y3 only if there is a border defined
        if (borderRadius != specRadius) {
          var y2 = (intx >= borderRadius) ? -1 : Math.ceil(Math.sqrt(Math.pow(borderRadius, 2) - Math.pow(intx, 2)));
          var y3 = (intx + 1 >= specRadius) ? -1 : Math.floor(Math.sqrt(Math.pow(specRadius, 2) - Math.pow((intx+1), 2))) - 1;
        }
        // Calculate y4
        var y4 = (intx >= specRadius) ? -1 : Math.ceil(Math.sqrt(Math.pow(specRadius, 2) - Math.pow(intx, 2)));
        // Draw bar on inside of the border with foreground colour
        if (y1 > -1) this.drawPixel(intx, 0, this.boxColour, trans, (y1 + 1), newCorner, true, specRadius);
        // Draw border/foreground antialiased pixels and border only if there is a border defined
        if (borderRadius != specRadius) {
          // Cycle the y-axis
          if (this.spec.antiAlias) {
            for (inty = y1 + 1; inty < y2; ++inty) {
              // For each of the pixels that need anti aliasing between the foreground and border colour draw single pixel divs
              if (this.backgroundImage != "") {
                var borderFract = curvyObject.pixelFraction(intx, inty, borderRadius) * 100;
                this.drawPixel(intx, inty, bcolor, trans, 1, newCorner, borderFract >= 30, specRadius);
              }
              else if (this.boxColour !== 'transparent') {
                var pixelcolour = curvyObject.BlendColour(this.boxColour, bcolor, curvyObject.pixelFraction(intx, inty, borderRadius));
                this.drawPixel(intx, inty, pixelcolour, trans, 1, newCorner, false, specRadius);
              }
              else this.drawPixel(intx, inty, bcolor, trans >> 1, 1, newCorner, false, specRadius);
            }
            // Draw bar for the border
            if (y3 >= y2) {
              if (y2 == -1) y2 = 0;
              this.drawPixel(intx, y2, bcolor, trans, (y3 - y2 + 1), newCorner, false, 0);
            }
            outsideColour = bcolor;  // Set the colour for the outside AA curve
            inty = y3;               // start_pos - 1 for y-axis AA pixels
          }
          else { // no antiAlias
            if (y3 > y1) { // NB condition was >=, changed to avoid zero-height divs
              this.drawPixel(intx, (y1 + 1), bcolor, trans, (y3 - y1), newCorner, false, 0);
            }
          }
        }
        else {
          outsideColour = this.boxColour;  // Set the colour for the outside curve
          inty = y1;               // start_pos - 1 for y-axis AA pixels
        }
        // Draw aa pixels?
        if (this.spec.antiAlias) {
          // Cycle the y-axis and draw the anti aliased pixels on the outside of the curve
          while (++inty < y4) {
            // For each of the pixels that need anti aliasing between the foreground/border colour & background draw single pixel divs
            this.drawPixel(intx, inty, outsideColour, (curvyObject.pixelFraction(intx, inty , specRadius) * trans), 1, newCorner, borderWidthTB <= 0, specRadius);
          }
        }
      }
      // END OF CORNER CREATION
      // ---------------------------------------------------- END

      /*
      Now we have a new corner we need to reposition all the pixels unless
      the current corner is the bottom right.
      */
      // Loop through all children (pixel bars)
      for (var t = 0, k = newCorner.childNodes.length; t < k; ++t) {
        // Get current pixel bar
        var pixelBar = newCorner.childNodes[t];
        // Get current top and left properties
        var pixelBarTop    = parseInt(pixelBar.style.top);
        var pixelBarLeft   = parseInt(pixelBar.style.left);
        var pixelBarHeight = parseInt(pixelBar.style.height);
        // Reposition pixels
        if (cc == "tl" || cc == "bl") {
          pixelBar.style.left = (specRadius - pixelBarLeft - 1) + "px"; // Left
        }
        if (cc == "tr" || cc == "tl"){
          pixelBar.style.top =  (specRadius - pixelBarHeight - pixelBarTop) + "px"; // Top
        }
        pixelBar.style.backgroundRepeat = this.backgroundRepeat;

        if (this.backgroundImage) switch(cc) {
          case "tr":
            pixelBar.style.backgroundPosition = (this.backgroundPosX - this.borderWidthL + specRadius - clientWidth - pixelBarLeft) + "px " + (this.backgroundPosY + pixelBarHeight + pixelBarTop + this.borderWidth - specRadius) + "px";
          break;
          case "tl":
            pixelBar.style.backgroundPosition = (this.backgroundPosX - specRadius + pixelBarLeft + this.borderWidthL) + "px " + (this.backgroundPosY - specRadius + pixelBarHeight + pixelBarTop + this.borderWidth) + "px";
          break;
          case "bl":
            pixelBar.style.backgroundPosition = (this.backgroundPosX - specRadius + pixelBarLeft + 1 + this.borderWidthL) + "px " + (this.backgroundPosY - clientHeight - this.borderWidth + (curvyBrowser.quirksMode ? pixelBarTop : -pixelBarTop) + specRadius) + "px";
          break;
          case "br":
            if (curvyBrowser.quirksMode) {
              pixelBar.style.backgroundPosition = (this.backgroundPosX + this.borderWidthL - clientWidth + specRadius - pixelBarLeft) + "px " + (this.backgroundPosY - clientHeight - this.borderWidth + pixelBarTop + specRadius) + "px";
            } else {
              pixelBar.style.backgroundPosition = (this.backgroundPosX - this.borderWidthL - clientWidth + specRadius - pixelBarLeft) + "px " + (this.backgroundPosY - clientHeight - this.borderWidth + specRadius - pixelBarTop) + "px";
            }
          //break;
        }
      }

      // Position the container
      switch (cc) {
        case "tl":
          newCorner.style.top = newCorner.style.left = "0";
          this.topContainer.appendChild(newCorner);
        break;
        case "tr":
          newCorner.style.top = newCorner.style.right = "0";
          this.topContainer.appendChild(newCorner);
        break;
        case "bl":
          newCorner.style.bottom = newCorner.style.left = "0";
          this.bottomContainer.appendChild(newCorner);
        break;
        case "br":
          newCorner.style.bottom = newCorner.style.right = "0";
          this.bottomContainer.appendChild(newCorner);
        //break;
      }
    }

    /*
      The last thing to do is draw the rest of the filler DIVs.
    */

    // Find out which corner has the bigger radius and get the difference amount
    var radiusDiff = {
      t : this.spec.radiusdiff('t'),
      b : this.spec.radiusdiff('b')
    };

    for (z in radiusDiff) {
      if (typeof z === 'function') continue; // for prototype, mootools frameworks
      if (!this.spec.get(z + 'R')) continue; // no need if no corners
      if (radiusDiff[z]) {
        // check unsupported feature and warn if necessary
        if (this.backgroundImage && this.spec.radiusSum(z) !== radiusDiff[z])
          curvyCorners.alert(this.errmsg('Not supported: unequal non-zero top/bottom radii with background image'));
        // Get the type of corner that is the smaller one
        var smallerCornerType = (this.spec[z + "lR"] < this.spec[z + "rR"]) ? z + "l" : z + "r";

        // First we need to create a DIV for the space under the smaller corner
        var newFiller = document.createElement("div");
        newFiller.style.height = radiusDiff[z] + "px";
        newFiller.style.width  =  this.spec.get(smallerCornerType + 'Ru');
        newFiller.style.position = "absolute";
        newFiller.style.fontSize = "1px";
        newFiller.style.overflow = "hidden";
        newFiller.style.backgroundColor = this.boxColour;

        // Position filler
        switch (smallerCornerType) {
          case "tl":
            newFiller.style.bottom =
            newFiller.style.left   = "0";
            newFiller.style.borderLeft = this.borderString;
            this.topContainer.appendChild(newFiller);
          break;
          case "tr":
            newFiller.style.bottom =
            newFiller.style.right  = "0";
            newFiller.style.borderRight = this.borderString;
            this.topContainer.appendChild(newFiller);
          break;
          case "bl":
            newFiller.style.top    =
            newFiller.style.left   = "0";
            newFiller.style.borderLeft = this.borderStringB;
            this.bottomContainer.appendChild(newFiller);
          break;
          case "br":
            newFiller.style.top    =
            newFiller.style.right  = "0";
            newFiller.style.borderRight = this.borderStringB;
            this.bottomContainer.appendChild(newFiller);
          //break;
        }
      }

      // Create the bar to fill the gap between each corner horizontally
      var newFillerBar = document.createElement("div");
      if (filter) newFillerBar.style.filter = filter; // IE8 bug fix
      newFillerBar.style.position = "relative";
      newFillerBar.style.fontSize = "1px";
      newFillerBar.style.overflow = "hidden";
      newFillerBar.style.width = this.fillerWidth(z);
      newFillerBar.style.backgroundColor = this.boxColour;
      newFillerBar.style.backgroundImage = this.backgroundImage;
      newFillerBar.style.backgroundRepeat= this.backgroundRepeat;

      switch (z) {
        case "t":
          // Top Bar
          if (this.topContainer) {
            if (curvyBrowser.quirksMode) {
              newFillerBar.style.height = 100 + topMaxRadius + "px";
            } else {
              newFillerBar.style.height = 100 + topMaxRadius - this.borderWidth + "px";
            }
            newFillerBar.style.marginLeft  = this.spec.tlR ? (this.spec.tlR - this.borderWidthL) + "px" : "0";
            newFillerBar.style.borderTop   = this.borderString;
            if (this.backgroundImage) {
              var x_offset = this.spec.tlR ?
                (this.backgroundPosX - (topMaxRadius - this.borderWidthL)) + "px " : "0 ";
              newFillerBar.style.backgroundPosition  = x_offset + this.backgroundPosY + "px";
              // Reposition the box's background image
              this.shell.style.backgroundPosition = this.backgroundPosX + "px " + (this.backgroundPosY - topMaxRadius + this.borderWidthL) + "px";
            }
            this.topContainer.appendChild(newFillerBar);
          }
        break;
        case "b":
          if (this.bottomContainer) {
            // Bottom Bar
            if (curvyBrowser.quirksMode) {
              newFillerBar.style.height     = botMaxRadius + "px";
            } else {
              newFillerBar.style.height     = botMaxRadius - this.borderWidthB + "px";
            }
            newFillerBar.style.marginLeft   = this.spec.blR ? (this.spec.blR - this.borderWidthL) + "px" : "0";
            newFillerBar.style.borderBottom = this.borderStringB;
            if (this.backgroundImage) {
              var x_offset = this.spec.blR ?
                (this.backgroundPosX + this.borderWidthL - botMaxRadius) + "px " : this.backgroundPosX + "px ";
              newFillerBar.style.backgroundPosition = x_offset + (this.backgroundPosY - clientHeight - this.borderWidth + botMaxRadius) + "px";
            }
            this.bottomContainer.appendChild(newFillerBar);
          }
        //break;
      }
    }

    // style content container
    this.contentContainer.style.position = "absolute";
    // contentContainer.style.border = "1px dotted #000"; // DEBUG, comment for production
    this.contentContainer.className    = "autoPadDiv";
    this.contentContainer.style.left   = this.borderWidthL + "px";
    // Get padding amounts
    // Apply top padding
    this.contentContainer.style.paddingTop = this.topPadding + "px";
    this.contentContainer.style.top = this.borderWidth + "px";
    // skip bottom padding - it doesn't show!
    // Apply left and right padding
    this.contentContainer.style.paddingLeft = this.leftPadding + "px";
    this.contentContainer.style.paddingRight = this.rightPadding + "px";
    z = clientWidth;
    if (!curvyBrowser.quirksMode) z -= this.leftPadding + this.rightPadding;
    this.contentContainer.style.width = z + "px";
    this.contentContainer.style.textAlign = curvyBrowser.get_style(this.box, 'textAlign');
    this.box.style.textAlign = 'left'; // important otherwise layout goes wild

    this.box.appendChild(this.contentContainer);
    if (boxDisp) boxDisp.style.display = 'none';
  }
  if (this.backgroundImage) {
    backgroundPosX = this.backgroundCheck(backgroundPosX);
    backgroundPosY = this.backgroundCheck(backgroundPosY);
    if (this.backgroundObject) {
      this.backgroundObject.holdingElement = this;
      this.dispatch = this.applyCorners;
      this.applyCorners = function() {
        if (this.backgroundObject.complete)
          this.dispatch();
        else this.backgroundObject.onload = new Function('curvyObject.dispatch(this.holdingElement);');
      }
    }
  }
}

// private
curvyObject.prototype.backgroundCheck = function(style) {
  if (style === 'top' || style === 'left' || parseInt(style) === 0) return 0;
  if (!(/^[-\d.]+px$/.test(style))  && !this.backgroundObject) {
    this.backgroundObject = new Image;
    var imgName = function(str) {
      var matches = /url\("?([^'"]+)"?\)/.exec(str);
      return (matches ? matches[1] : str);
    }
    this.backgroundObject.src = imgName(this.backgroundImage);
  }
  return style;
}

//private
curvyObject.dispatch = function(obj) {
  if ('dispatch' in obj)
    obj.dispatch();
  else throw obj.newError('No dispatch function');
}

// private append a pixel DIV to newCorner
curvyObject.prototype.drawPixel = function(intx, inty, colour, transAmount, height, newCorner, image, cornerRadius) {
  var pixel = document.createElement("div");
  pixel.style.height   = height + "px";
  pixel.style.width    = "1px";
  pixel.style.position = "absolute";
  pixel.style.fontSize = "1px";
  pixel.style.overflow = "hidden";
  var topMaxRadius = this.spec.get('tR');
  pixel.style.backgroundColor = colour;
  // Don't apply background image to border pixels
  if (image && this.backgroundImage != "") {
    pixel.style.backgroundImage = this.backgroundImage;
    pixel.style.backgroundPosition  = "-" + (this.boxWidth - (cornerRadius - intx) + this.borderWidth) + "px -" + ((this.boxHeight + topMaxRadius + inty) - this.borderWidth) + "px";
  }
  // Set opacity if the transparency is anything other than 100
  if (transAmount != 100) curvyObject.setOpacity(pixel, transAmount);
  // Set position
  pixel.style.top = inty + "px";
  pixel.style.left = intx + "px";
  //pixel.nodeValue = ' ';
  newCorner.appendChild(pixel);
}

//private
curvyObject.prototype.fillerWidth = function(tb) {
  var bWidth = curvyBrowser.quirksMode ? 0 : this.spec.radiusCount(tb) * this.borderWidthL;
  return (this.boxWidth - this.spec.radiusSum(tb) + bWidth) + 'px';
}

//private
curvyObject.prototype.errmsg = function(msg, gravity) {
  var extradata = "\ntag: " + this.box.tagName;
  if (this.box.id) extradata += "\nid: " + this.box.id;
  if (this.box.className) extradata += "\nclass: " + this.box.className;
  var parent;
  if ((parent = this.box.parentNode) === null)
    extradata += "\n(box has no parent)";
  else {
    extradata += "\nParent tag: " + parent.tagName;
    if (parent.id) extradata += "\nParent ID: " + parent.id;
    if (parent.className) extradata += "\nParent class: " + parent.className;
  }
  if (gravity === undefined) gravity = 'warning';
  return 'curvyObject ' + gravity + ":\n" + msg + extradata;
}

//private
curvyObject.prototype.newError = function(msg) {
  return new Error(this.errmsg(msg, 'exception'));
}

// ------------- UTILITY FUNCTIONS

// private Convert a number 0..255 to hex
curvyObject.IntToHex = function(strNum) {
  var hexdig = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' ];

  return hexdig[strNum >>> 4] + '' + hexdig[strNum & 15];
}

/* private
  Blends the two colours by the fraction
  returns the resulting colour as a string in the format "#FFFFFF"
*/

curvyObject.BlendColour = function(Col1, Col2, Col1Fraction) {
  if (Col1 === 'transparent' || Col2 === 'transparent') throw this.newError('Cannot blend with transparent');
  if (Col1.charAt(0) !== '#') {
    //curvyCorners.alert('Found colour1 ' + Col1 + ': please let us know you saw this report.');
    Col1 = curvyObject.format_colour(Col1);
  }
  if (Col2.charAt(0) !== '#') {
    //curvyCorners.alert('Found colour2 ' + Col2 + ': please let us know you saw this report.');
    Col2 = curvyObject.format_colour(Col2);
  }
  var red1 = parseInt(Col1.substr(1, 2), 16);
  var green1 = parseInt(Col1.substr(3, 2), 16);
  var blue1 = parseInt(Col1.substr(5, 2), 16);
  var red2 = parseInt(Col2.substr(1, 2), 16);
  var green2 = parseInt(Col2.substr(3, 2), 16);
  var blue2 = parseInt(Col2.substr(5, 2), 16);

  if (Col1Fraction > 1 || Col1Fraction < 0) Col1Fraction = 1;

  var endRed = Math.round((red1 * Col1Fraction) + (red2 * (1 - Col1Fraction)));
  if (endRed > 255) endRed = 255;
  if (endRed < 0) endRed = 0;

  var endGreen = Math.round((green1 * Col1Fraction) + (green2 * (1 - Col1Fraction)));
  if (endGreen > 255) endGreen = 255;
  if (endGreen < 0) endGreen = 0;

  var endBlue = Math.round((blue1 * Col1Fraction) + (blue2 * (1 - Col1Fraction)));
  if (endBlue > 255) endBlue = 255;
  if (endBlue < 0) endBlue = 0;

  return "#" + curvyObject.IntToHex(endRed) + curvyObject.IntToHex(endGreen)+ curvyObject.IntToHex(endBlue);
}

/*
 * private
  For a pixel cut by the line determines the fraction of the pixel on the 'inside' of the
  line.  Returns a number between 0 and 1
*/
curvyObject.pixelFraction = function(x, y, r) {
  var fraction;
  var rsquared = r * r;

  /*
    determine the co-ordinates of the two points on the perimeter of the pixel that the
    circle crosses
  */
  var xvalues = new Array(2);
  var yvalues = new Array(2);
  var point = 0;
  var whatsides = "";

  // x + 0 = Left
  var intersect = Math.sqrt(rsquared - Math.pow(x, 2));

  if (intersect >= y && intersect < (y + 1)) {
    whatsides = "Left";
    xvalues[point] = 0;
    yvalues[point] = intersect - y;
    ++point;
  }
  // y + 1 = Top
  intersect = Math.sqrt(rsquared - Math.pow(y + 1, 2));

  if (intersect >= x && intersect < (x + 1)) {
    whatsides += "Top";
    xvalues[point] = intersect - x;
    yvalues[point] = 1;
    ++point;
  }
  // x + 1 = Right
  intersect = Math.sqrt(rsquared - Math.pow(x + 1, 2));

  if (intersect >= y && intersect < (y + 1)) {
    whatsides += "Right";
    xvalues[point] = 1;
    yvalues[point] = intersect - y;
    ++point;
  }
  // y + 0 = Bottom
  intersect = Math.sqrt(rsquared - Math.pow(y, 2));

  if (intersect >= x && intersect < (x + 1)) {
    whatsides += "Bottom";
    xvalues[point] = intersect - x;
    yvalues[point] = 0;
  }

  /*
    depending on which sides of the perimeter of the pixel the circle crosses calculate the
    fraction of the pixel inside the circle
  */
  switch (whatsides) {
    case "LeftRight":
      fraction = Math.min(yvalues[0], yvalues[1]) + ((Math.max(yvalues[0], yvalues[1]) - Math.min(yvalues[0], yvalues[1])) / 2);
    break;

    case "TopRight":
      fraction = 1 - (((1 - xvalues[0]) * (1 - yvalues[1])) / 2);
    break;

    case "TopBottom":
      fraction = Math.min(xvalues[0], xvalues[1]) + ((Math.max(xvalues[0], xvalues[1]) - Math.min(xvalues[0], xvalues[1])) / 2);
    break;

    case "LeftBottom":
      fraction = yvalues[0] * xvalues[1] / 2;
    break;

    default:
      fraction = 1;
  }

  return fraction;
}

//private Returns an array of rgb values
curvyObject.rgb2Array = function(rgbColour) {
  // Remove rgb()
  var rgbValues = rgbColour.substring(4, rgbColour.indexOf(")"));

  // Split RGB into array
  return rgbValues.split(", ");
}

// private This function converts CSS rgb(x, x, x) to hexadecimal
curvyObject.rgb2Hex = function(rgbColour) {
  try {
    // Get array of RGB values
    var rgbArray = curvyObject.rgb2Array(rgbColour);

    // Get RGB values
    var red   = parseInt(rgbArray[0]);
    var green = parseInt(rgbArray[1]);
    var blue  = parseInt(rgbArray[2]);

    // Build hex colour code
    var hexColour = "#" + curvyObject.IntToHex(red) + curvyObject.IntToHex(green) + curvyObject.IntToHex(blue);
  }
  catch (e) {
    var msg = 'getMessage' in e ? e.getMessage() : e.message;
    throw new Error("Error (" + msg + ") converting RGB value to Hex in rgb2Hex");
  }

  return hexColour;
}

/*private
  Function by Simon Willison from sitepoint.com
  Modified by Cameron Cooke adding Safari's rgba support
*/
curvyObject.setOpacity = function(obj, opacity) {
  opacity = (opacity == 100) ? 99.999 : opacity;

  if (curvyBrowser.isSafari && obj.tagName != "IFRAME") {
    // Get array of RGB values
    var rgbArray = curvyObject.rgb2Array(obj.style.backgroundColor);

    // Get RGB values
    var red   = parseInt(rgbArray[0]);
    var green = parseInt(rgbArray[1]);
    var blue  = parseInt(rgbArray[2]);

    // Safari using RGBA support
    obj.style.backgroundColor = "rgba(" + red + ", " + green + ", " + blue + ", " + opacity/100 + ")";
  }
  else if (typeof obj.style.opacity !== "undefined") { // W3C
    obj.style.opacity = opacity / 100;
  }
  else if (typeof obj.style.MozOpacity !== "undefined") { // Older Mozilla
    obj.style.MozOpacity = opacity / 100;
  }
  else if (typeof obj.style.filter != "undefined") { // IE
    obj.style.filter = "alpha(opacity=" + opacity + ")";
  }
  else if (typeof obj.style.KHTMLOpacity != "undefined") { // Older KHTML Based curvyBrowsers
    obj.style.KHTMLOpacity = opacity / 100;
  }
}


/** 
 * Cross browser add event wrapper
 * @param {Object}
 * @param {Object}
 * @param {Object}
 * @param {Boolean}
 * @return {Boolean}
 *  
 */
function addEvent(elm, evType, fn, useCapture) {
  if (elm.addEventListener) {
    elm.addEventListener(evType, fn, useCapture);
    return true;
  }
  if (elm.attachEvent) return elm.attachEvent('on' + evType, fn);
  elm['on' + evType] = fn;
  return false;
}

// private Gets the computed colour.
curvyObject.getComputedColour = function(colour) {
  var d = document.createElement('DIV');
  d.style.backgroundColor = colour;
  document.body.appendChild(d);

  if(window.getComputedStyle) { // Mozilla, Opera, Chrome, Safari
    var rtn = document.defaultView.getComputedStyle(d, null).getPropertyValue('background-color');
    d.parentNode.removeChild(d);
    if(rtn.substr(0, 3) === "rgb") rtn = curvyObject.rgb2Hex(rtn);
    return rtn;
  }
  else { // IE
    var rng = document.body.createTextRange();
    rng.moveToElementText(d);
    rng.execCommand('ForeColor', false, colour);
    var iClr = rng.queryCommandValue('ForeColor');
    var rgb = "rgb("+(iClr & 0xFF)+", "+((iClr & 0xFF00)>>8)+", "+((iClr & 0xFF0000)>>16)+")";
    d.parentNode.removeChild(d);
    rng = null;
    return curvyObject.rgb2Hex(rgb);
  }
}

// private convert colour name, rgb() and #RGB to #RRGGBB
curvyObject.format_colour = function(colour) {
  // Make sure colour is set and not transparent
  if (colour != "" && colour != "transparent") {
    // RGB Value?
    if (colour.substr(0, 3) === "rgb") {
      // Get HEX aquiv.
      colour = curvyObject.rgb2Hex(colour);
    }
    else if (colour.charAt(0) !== '#') {
      // Convert colour name to hex value
      colour = curvyObject.getComputedColour(colour);
    }
    else if (colour.length === 4) {
      // 3 chr colour code add remainder
      colour = "#" + colour.charAt(1) + colour.charAt(1) + colour.charAt(2) + colour.charAt(2) + colour.charAt(3) + colour.charAt(3);
    }
  }
  return colour;
}

// private Get elements by class by Dustin Diaz / CPKS
// NB if searchClass is a class name, it MUST be preceded by '.'
curvyCorners.getElementsByClass = function(searchClass, node) {
  var classElements = new Array;
  if (node === undefined) node = document;
  searchClass = searchClass.split('.'); // see if there's a tag in there
  var tag = '*'; // prepare for no tag
  if (searchClass.length === 1) {
    tag = searchClass[0];
    searchClass = false;
  }
  else {
    if (searchClass[0]) tag = searchClass[0];
    searchClass = searchClass[1];
  }
  var i, els, elsLen;
  if (tag.charAt(0) === '#') {
    els = document.getElementById(tag.substr(1));
    if (els) classElements.push(els);
  }
  else {
    els = node.getElementsByTagName(tag);
    elsLen = els.length;
    if (searchClass) {
      var pattern = new RegExp("(^|\\s)" + searchClass + "(\\s|$)");
      for (i = 0; i < elsLen; ++i) {
        if (pattern.test(els[i].className)) classElements.push(els[i]);
      }
    }
    else for (i = 0; i < elsLen; ++i) classElements.push(els[i]);
  }
  return classElements;
}

if (curvyBrowser.isMoz || curvyBrowser.isWebKit)
  var curvyCornersNoAutoScan = true; // it won't do anything anyway.
else {
  // autoscan code
  curvyCorners.scanStyles = function() {
    function units(num) {
      var matches = /^[\d.]+(\w+)$/.exec(num);
      return matches[1];
    }
    var t, i, j;

    if (curvyBrowser.isIE) {
      function procIEStyles(rule) {
        var style = rule.style;

        if(curvyBrowser.ieVer > 6.0) {
          var allR = style['-webkit-border-radius'] || 0;
          var tR   = style['-webkit-border-top-right-radius'] || 0;
          var tL   = style['-webkit-border-top-left-radius'] || 0;
          var bR   = style['-webkit-border-bottom-right-radius'] || 0;
          var bL   = style['-webkit-border-bottom-left-radius'] || 0;
        }
        else {
          var allR = style['webkit-border-radius'] || 0;
          var tR   = style['webkit-border-top-right-radius'] || 0;
          var tL   = style['webkit-border-top-left-radius'] || 0;
          var bR   = style['webkit-border-bottom-right-radius'] || 0;
          var bL   = style['webkit-border-bottom-left-radius'] || 0;
        }
        if (allR || tL || tR || bR || bL) {
          var settings = new curvyCnrSpec(rule.selectorText);
          if (allR)
            settings.setcorner(null, null, parseInt(allR), units(allR));
          else {
            if (tR) settings.setcorner('t', 'r', parseInt(tR), units(tR));
            if (tL) settings.setcorner('t', 'l', parseInt(tL), units(tL));
            if (bL) settings.setcorner('b', 'l', parseInt(bL), units(bL));
            if (bR) settings.setcorner('b', 'r', parseInt(bR), units(bR));
          }
          curvyCorners(settings);
        }
      }
      for (t = 0; t < document.styleSheets.length; ++t) {
        if (document.styleSheets[t].imports) {
          for (i = 0; i < document.styleSheets[t].imports.length; ++i)
            for (j = 0; j < document.styleSheets[t].imports[i].rules.length; ++j)
              procIEStyles(document.styleSheets[t].imports[i].rules[j]);
        }
        for (i = 0; i < document.styleSheets[t].rules.length; ++i)
          procIEStyles(document.styleSheets[t].rules[i]);
      }
    }
    else if (curvyBrowser.isOp) {
      for (t = 0; t < document.styleSheets.length; ++t) {
        if (operasheet.contains_border_radius(t)) {
          j = new operasheet(t);
          for (i in j.rules) if (!isNaN(i))
            curvyCorners(j.rules[i]);
        }
      }
    }
    else curvyCorners.alert('Scanstyles does nothing in Webkit/Firefox');
  };

  // Dean Edwards/Matthias Miller/John Resig

  curvyCorners.init = function() {
    // quit if this function has already been called
    if (arguments.callee.done) return;

    // flag this function so we don't do the same thing twice
    arguments.callee.done = true;

    // kill the timer
    if (curvyBrowser.isWebKit && curvyCorners.init.timer) {
      clearInterval(curvyCorners.init.timer);
      curvyCorners.init.timer = null;
    }

    // do stuff
    curvyCorners.scanStyles();
  };
}

if (typeof curvyCornersNoAutoScan === 'undefined' || curvyCornersNoAutoScan === false) {
  if (curvyBrowser.isOp)
    document.addEventListener("DOMContentLoaded", curvyCorners.init, false);
  else addEvent(window, 'load', curvyCorners.init, false);
}