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Revision: 19944
at November 3, 2009 15:23 by jannisg

Initial Code
jQuery.preloadCssImages = function(){

        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


                        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        

                                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
        return allImgs;

Initial URL

Initial Description

Initial Title
jQuery CSS Image Preloader

Initial Tags
css, jquery, images

Initial Language