$(document).ready(function(){
	$(".Rollover").hover(
	 function() {
	  curr = $(this).find("img").attr("src");
	  overlen = curr.length;
	  over = curr.substr(0, overlen-4);
	  over = over+'_hover.gif';
	  $(this).find("img").attr({ src: over});
	 },
	 function() {
	  $(this).find("img").attr({ src: curr});
	 }
	)
	
	$(".Rollover").find("img").each(function(i) {
	  temp = this.src;
	  prelen = temp.length;
	  pre = temp.substr(0, prelen-4);
	  pre = pre+'_hover.gif';
	  preload_image_object = new Image();
	  preload_image_object.src = pre;
	});
});