Preload background images

gistfile1.txt

/* Preload images */
        var images = ['/images/contentbg.jpg','/images/scrollbtn.gif','/images/cross.png','/images/sidebar_top_gradient.jpg','/images/bulletpointdown.gif'],
            image_obj = new Image();

        for (var image=0; image<images.length; image++) {
            image_obj.src = images[image];
        }