var preload_images = ["images/col2.jpg", "images/col2-selected.jpg", 
					  "images/col3.jpg", "images/col3-selected.jpg", 
					  "images/col4.jpg", "images/col4-selected.jpg", 
					  "images/col5.jpg", "images/col5-selected.jpg"];

jQuery(document).ready(function() {
	var preloaded = new Array();
	for(var i=0; i<preload_images.length; i++) {
		var img = new Image();
		img.src = preload_images[i];
		preloaded.push(img);
	}
});