/************************************************************************************************************
	@fileoverview
	Rounded corners class
	(C) www.dhtmlgoodies.com, September 2006
	This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.
	Terms of use: Look at the terms of use at http://www.dhtmlgoodies.com/index.html?page=termsOfUse
	Thank you!
	www.dhtmlgoodies.com
	Alf Magne Kalleland
************************************************************************************************************/
function roundedCorners(){
	var roundedCornerTargets;
	this.roundedCornerTargets = new Array();
}
roundedCorners.prototype = {
    addTarget : function(divId,xRadius,yRadius,color,backgroundColor,padding,heightOfContent,whichCorners){	
    	var index = this.roundedCornerTargets.length;
    	this.roundedCornerTargets[index] = new Array();
    	this.roundedCornerTargets[index]['divId'] = divId;
    	this.roundedCornerTargets[index]['xRadius'] = xRadius;
    	this.roundedCornerTargets[index]['yRadius'] = yRadius;
    	this.roundedCornerTargets[index]['color'] = color;
    	this.roundedCornerTargets[index]['backgroundColor'] = backgroundColor;
    	this.roundedCornerTargets[index]['padding'] = padding;
    	this.roundedCornerTargets[index]['heightOfContent'] = heightOfContent;
    	this.roundedCornerTargets[index]['whichCorners'] = whichCorners;  
    },
	init : function(){
		for(var targetCounter=0;targetCounter < this.roundedCornerTargets.length;targetCounter++){
			whichCorners = this.roundedCornerTargets[targetCounter]['whichCorners'];
			divId = this.roundedCornerTargets[targetCounter]['divId'];
			xRadius = this.roundedCornerTargets[targetCounter]['xRadius'];
			yRadius = this.roundedCornerTargets[targetCounter]['yRadius'];
			color = this.roundedCornerTargets[targetCounter]['color'];
			backgroundColor = this.roundedCornerTargets[targetCounter]['backgroundColor'];
			padding = this.roundedCornerTargets[targetCounter]['padding'];
			heightOfContent = this.roundedCornerTargets[targetCounter]['heightOfContent'];
			whichCorners = this.roundedCornerTargets[targetCounter]['whichCorners'];
			var cornerArray = new Array();
			if(!whichCorners || whichCorners=='all'){
				cornerArray['top_left'] = true;
				cornerArray['top_right'] = true;
				cornerArray['bottom_left'] = true;
				cornerArray['bottom_right'] = true;
			}else{
				cornerArray = whichCorners.split(/,/gi);
				for(var prop in cornerArray)cornerArray[cornerArray[prop]] = true;
			}
			var factorX = xRadius/yRadius;
			var obj = document.getElementById(divId);
			obj.style.backgroundColor=null;	
			obj.style.backgroundColor='transparent';
			var content = obj.innerHTML;	
			obj.innerHTML = '';	
			if(cornerArray['top_left'] || cornerArray['top_right']){
				var topBar_container = document.createElement('DIV');
				topBar_container.style.height = yRadius + 'px';
				topBar_container.style.overflow = 'hidden';	
				obj.appendChild(topBar_container);		
				var currentAntialiasSize = 0;
				var savedRestValue = 0;
				for(no=1;no<=yRadius;no++){
					var marginSize = (xRadius - (this.getY((yRadius - no),yRadius,factorX)));					
					var marginSize_decimals = (xRadius - (this.getY_withDecimals((yRadius - no),yRadius,factorX)));					
					var restValue = xRadius - marginSize_decimals;		
					var antialiasSize = xRadius - marginSize - Math.floor(savedRestValue)
					var foregroundSize = xRadius - (marginSize + antialiasSize);	
					var el = document.createElement('DIV');
					el.style.overflow='hidden';
					el.style.height = '1px';					
					if(cornerArray['top_left'])el.style.marginLeft = marginSize + 'px';				
					if(cornerArray['top_right'])el.style.marginRight = marginSize + 'px';	
					topBar_container.appendChild(el);				
					var y = topBar_container;		
					for(var no2=1;no2<=antialiasSize;no2++){
						switch(no2){
							case 1:
								if (no2 == antialiasSize)
									blendMode = ((restValue + savedRestValue) /2) - foregroundSize;
								else {
								  var tmpValue2 = (1 - (marginSize + 1) / xRadius); 
								  var exp = tmpValue2 * tmpValue2;
								  tmpValue = yRadius * Math.sqrt(1 - exp);
								  blendMode = (restValue - foregroundSize - antialiasSize + 1) * (tmpValue - (yRadius - no)) /2;
								}						
								break;							
							case antialiasSize:
								var tmpValue2 = ((xRadius - marginSize - no2 + 1) / xRadius);
								var exp = tmpValue2 * tmpValue2;
								tmpValue = Math.sqrt(1 - exp) * yRadius;
								blendMode = 1 - (1 - (tmpValue - (yRadius - no))) * (1 - (savedRestValue - foregroundSize)) /2;		
								break;
							default:		
								var tmpValue3 = ((xRadius - marginSize - no2) / xRadius);		
								var exp = tmpValue3 * tmpValue3;
								tmpValue2 = Math.sqrt(1 - exp) * yRadius;	
								tmpValue3 = ((xRadius - marginSize - no2 + 1) / xRadius);					
								var exp = tmpValue3 * tmpValue3;
								tmpValue = Math.sqrt(1 - exp) * yRadius;
								blendMode = ((tmpValue + tmpValue2) / 2) - (yRadius - no);							
						}
						el.style.backgroundColor = this.__blendColors(backgroundColor,color,blendMode);
						y.appendChild(el);
						y = el;
						var el = document.createElement('DIV');
						el.style.height = '1px';	
						el.style.overflow='hidden';
						if(cornerArray['top_left'])el.style.marginLeft = '1px';
						if(cornerArray['top_right'])el.style.marginRight = '1px';    						
						el.style.backgroundColor=color;					
					}
					y.appendChild(el);				
					savedRestValue = restValue;
				}
			}
			var contentDiv = document.createElement('DIV');
			contentDiv.className = obj.className;
			contentDiv.style.border='1px solid ' + color;
			contentDiv.innerHTML = content;
			contentDiv.style.backgroundColor=color;
			contentDiv.style.paddingLeft = padding + 'px';
			contentDiv.style.paddingRight = padding + 'px';
			if(!heightOfContent)heightOfContent = '';
			heightOfContent = heightOfContent + '';
			if(heightOfContent.length>0 && heightOfContent.indexOf('%')==-1)heightOfContent = heightOfContent + 'px';
			if(heightOfContent.length>0)contentDiv.style.height = heightOfContent;
			obj.appendChild(contentDiv);
			if(cornerArray['bottom_left'] || cornerArray['bottom_right']){
				var bottomBar_container = document.createElement('DIV');
				bottomBar_container.style.height = yRadius + 'px';
				bottomBar_container.style.overflow = 'hidden';	
				obj.appendChild(bottomBar_container);		
				var currentAntialiasSize = 0;
				var savedRestValue = 0;
				for(no=1;no<=yRadius;no++){
					var marginSize = (xRadius - (this.getY((yRadius - no),yRadius,factorX)));					
					var marginSize_decimals = (xRadius - (this.getY_withDecimals((yRadius - no),yRadius,factorX)));					
					var restValue = (xRadius - marginSize_decimals);				
					var antialiasSize = xRadius - marginSize - Math.floor(savedRestValue)
					var foregroundSize = xRadius - (marginSize + antialiasSize);	
					var el = document.createElement('DIV');
					el.style.overflow='hidden';
					el.style.height = '1px';					
					if(cornerArray['bottom_left'])el.style.marginLeft = marginSize + 'px';				
					if(cornerArray['bottom_right'])el.style.marginRight = marginSize + 'px';	
					bottomBar_container.insertBefore(el,bottomBar_container.firstChild);				
					var y = bottomBar_container;		
					for(var no2=1;no2<=antialiasSize;no2++){
						switch(no2){
							case 1:
								if (no2 == antialiasSize)
									blendMode = ((restValue + savedRestValue) /2) - foregroundSize;
								else {
								  var tmpValue2 = (1 - (marginSize + 1) / xRadius); 
								  var exp = tmpValue2 * tmpValue2;
								  tmpValue = yRadius * Math.sqrt(1 - exp);
								  blendMode = (restValue - foregroundSize - antialiasSize + 1) * (tmpValue - (yRadius - no)) /2;
								}						
								break;							
							case antialiasSize:
								var tmpValue2 = ((xRadius - marginSize - no2 + 1) / xRadius);
								var exp = tmpValue2 * tmpValue2;
								tmpValue = Math.sqrt(1 - exp) * yRadius;
								blendMode = 1 - (1 - (tmpValue - (yRadius - no))) * (1 - (savedRestValue - foregroundSize)) /2;		
								break;
							default:		
								var tmpValue3 = ((xRadius - marginSize - no2) / xRadius);		
								var exp = tmpValue3 * tmpValue3;
								tmpValue2 = Math.sqrt(1 - exp) * yRadius;	
								tmpValue3 = ((xRadius - marginSize - no2 + 1) / xRadius);					
								var exp = tmpValue3 * tmpValue3;
								tmpValue = Math.sqrt(1 - exp) * yRadius;
								blendMode = ((tmpValue + tmpValue2) / 2) - (yRadius - no);							
						}
						el.style.backgroundColor = this.__blendColors(backgroundColor,color,blendMode);
						y.insertBefore(el,y.firstChild);
						y = el;
						var el = document.createElement('DIV');
						el.style.height = '1px';	
						el.style.overflow='hidden';
						if(cornerArray['bottom_left'])el.style.marginLeft = '1px';
						if(cornerArray['bottom_right'])el.style.marginRight = '1px';    						
					}
					el.style.backgroundColor=color;	
					y.appendChild(el);				
					savedRestValue = restValue;
				}
			}	
		}
	},		
	getY : function(x,maxX,factorX){return Math.max(0,Math.ceil(factorX * Math.sqrt( (maxX * maxX) - (x*x)) ));},
	getY_withDecimals : function(x,maxX,factorX){ return Math.max(0,factorX * Math.sqrt( (maxX * maxX) - (x*x)) );},
	__blendColors : function (colorA, colorB, blendMode) {
		var colorArrayA = [parseInt('0x' + colorA.substring(1,3)), parseInt('0x' + colorA.substring(3, 5)), parseInt('0x' + colorA.substring(5, 7))];	
		var colorArrayB = [parseInt('0x' + colorB.substring(1,3)), parseInt('0x' + colorB.substring(3, 5)), parseInt('0x' + colorB.substring(5, 7))];	
		var red = Math.round(colorArrayA[0] + (colorArrayB[0] - colorArrayA[0])*blendMode).toString(16) + '';	
		var green = Math.round(colorArrayA[1] + (colorArrayB[1] - colorArrayA[1])*blendMode).toString(16) + '';	
		var blue = Math.round(colorArrayA[2] + (colorArrayB[2] - colorArrayA[2])*blendMode).toString(16) + '';	
		return '#' + red + green+ blue;	
	}
}