/* jQuery.preloader - v0.95 - K Reeve aka BinaryKitten
*
* v0.95
*       # Note - keeping below v1 as really not sure that I consider it public usable.
*       # But it saying that it does the job it was intended to do.
*       Added Completion of loading callback.
*       Main Reworking With Thanks to Remy Sharp of jQuery for Designers
*
*
* v0.9
*       Fixed .toString being .toSteing
*
* v0.8
*               Fixed sheet.href being null error (was causing issues in FF3RC1)
*
* v0.7
*               Remade the preLoadImages from jQuery to DOM
*
* v0.6
*               Fixed IE6 Compatability!
*               Moved from jQuery to DOM
*
* v0.5
*               Shifted the additionalimages loader in the preLoadAllImages so it wasn't called multiple times
*               Created secondary .preLoadImages to handle additionalimages and so it can be called on itself
*/

(function ($) {
		$.preLoadImages = function(imageList,callback) {
				var pic = [], i, total, loaded = 0;
				if (typeof imageList != 'undefined') {
						if ($.isArray(imageList)) {
								total = imageList.length; // used later
										for (i=0; i < total; i++) {
												pic[i] = new Image();
												pic[i].onload = function() {
														loaded++; // should never hit a race condition due to JS's non-threaded nature
														if (loaded == total) {
																if ($.isFunction(callback)) {
																		callback();
																}
														}
												};
												pic[i].src = imageList[i];
										}
						}
						else {
								pic[0] = new Image();
								pic[0].onload = function() {
										if ($.isFunction(callback)) {
												callback();
										}
								}
								pic[0].src = imageList;
						}
				}
				pic = undefined;
		};

		$.preLoadCSSImages = function(callback) {
				var pic = [], i, imageList = [], loaded = 0, total, regex = new RegExp("url\((.*)\)",'i'),spl;
				var cssSheets = document.styleSheets, path,myRules,Rule,match,txt,img,sheetIdx,ruleIdx;
				for (sheetIdx=0;sheetIdx < cssSheets.length;sheetIdx++){
						var sheet = cssSheets[sheetIdx];
						if (typeof sheet.href == 'string' && sheet.href.length > 0) {
								spl = sheet.href.split('/');spl.pop();path = spl.join('/')+'/';
						}
						else {
								path = './';
						}
						myRules = sheet.cssRules ? sheet.cssRules : sheet.rules;
						for (ruleIdx=0;ruleIdx < myRules.length;ruleIdx++) {
								Rule = myRules[ruleIdx];
								txt = Rule.cssText ? Rule.cssText : Rule.style.cssText;
								match = regex.exec(txt);
								if (match != null) {
										img = match[1].substring(1,match[1].indexOf(')',1));
										if (img.substring(0,4) == 'http') {
												imageList[imageList.length] = img;
										}
										else if ( match[1].substring(1,2) == '/') {
												var p2 = path.split('/');p2.pop();p2.pop();p2x = p2.join("/");
												imageList[imageList.length] = p2x+img;
										}
										else {
												imageList[imageList.length] = path+img;
										}
								}
						};
				};

				total = imageList.length; // used later
				for (i=0; i < total; i++) {
						pic[i] = new Image();
						pic[i].onload = function() {
								loaded++; // should never hit a race condition due to JS's non-threaded nature
								if (loaded == total) {
										if ($.isFunction(callback)) {
												callback();
										}
								}
						};
						pic[i].src = imageList[i];
				}

		};
		$.preLoadAllImages = function(imageList,callback) {
				if (typeof imageList != 'undefined') {
						if ($.isFunction(imageList)) {
								callback = imageList;
						}
						else if (!$.isArray(imageList)) {
								imageList = [imageList];
						}
				}
				$.preLoadCSSImages(function(){
						if (imageList.length > 0) {
								$.preLoadImages(imageList,function(){
										callback();
								});
						}
						else {
								callback();
						}
				});
		}
})(jQuery);