var allImgs = [];//new array for all the image urls  
var k = 0; //iterator for adding images
var sheets = document.styleSheets;//array of stylesheets
for (var i = 0; i<sheets .length; i++) {//loop through each stylesheet
	var cssPile = '';//create large string of all css rules in sheet
	var csshref = (sheets[i].href) ? sheets[i].href : 'window.location.href';
	var baseURLarr = csshref.split('/');//split href at / to make array
	baseURLarr.pop();//remove file path from baseURL array
	var baseURL = baseURLarr.join('/');//create base url for the images in this sheet (css file's dir)
	
	if(baseURL!="") baseURL+='/'; //tack on a / if needed
	if(document.styleSheets[i].cssRules){//w3
	        var thisSheetRules = document.styleSheets[i].cssRules; //w3
	        for(var j = 0; j<thisSheetRules.length; j++){
	                cssPile+= thisSheetRules[j].cssText;
	        }
	} else {
	        cssPile+= document.styleSheets[i].cssText;
	}
	
	// parse cssPile for image urls and load them into the DOM
	var imgUrls = cssPile.match(/[^\(]+\.(gif|jpg|jpeg|png)/g); // reg ex to get a string of between a "(" and a ".filename"
	if(imgUrls != null && imgUrls.length>0 && imgUrls != ''){ // loop array
	        var arr = jQuery.makeArray(imgUrls); // create array from regex obj
	        jQuery(arr).each(function(){
	                allImgs[k] = new Image(); // new img obj
	                allImgs[k].src = (this[0] == '/' || this.match('http://')) ? this : baseURL + this;     //set src either absolute or rel to css dir
	                k++;
	        });
	}
}//loop
// console.log(allImgs);