jQuery.preloadImages = function()
 {
 	for(var i = 0; i<arguments.length; i++)
 	{
 		jQuery("<img>").attr("src", arguments[i]);
 	}
 }
 
 // list all images to preload first (can run before page is fully loaded)
$.preloadImages("images/home_btn_02.jpg", "images/register_btn_02.jpg", "images/request_btn_02.jpg", "images/submit_btn_02.jpg");
 
 // Change the file names on the fly
 $(document).ready(function() {
 		// set up rollover
 		$(".rollover").hover(
 			function()
 			{
 				this.src = this.src.replace("01","02");
 			},
 			function()
 			{
 				this.src = this.src.replace("02","01");
 			}
 		);
	
 	}
 )