gistfile1.js

/*!
 * jQuery.preloadImg
 * description: cache images via $.preloadImg(['src','src']) or $('img').preloadImg()
 * author: Cody Lindley
 */

(function($) {

	$.preloadImg = function() {
		$.preloadImg.runLoader(arguments[0]);
	};
	
	$.extend($.preloadImg,{
		cached:[],
		temp:[],
		runLoader:function() {
			var argsLength = arguments[0].length;//cache length of array
	    	for (var i = argsLength; i--;) {//load each url
	      		var cacheImage = document.createElement('img');
	      		cacheImage.src = arguments[0][i];
	      		this.cached.push(cacheImage);//fix for ie bug
	    	}
		}
	});
	
	$.fn.preloadImg = function() {
		if ($(this).length === 0) {return};//if the jQuery wrapper set is empty return
		$.preloadImg.temp = [];
		this.each(function() {//loop over the elements in the wrapper
			var elmSrc = $(this).attr('src');//cache the src value
			if (elmSrc === undefined || elmSrc === '') {return};//return if the src is underfined or empty string
			$.preloadImg.temp.push(elmSrc);//add to temp array
		});

		$.preloadImg.runLoader($.preloadImg.temp);
		
		return this;//return the jQuery object
		
	};
	
})(jQuery);