$(document).ready(function(){
	$('li a img').hover(function(){
		$(this).attr("src","templates/ptcsense/images/"+$(this).attr('class')+"2.gif");
	},function(){
		$(this).attr("src","templates/ptcsense/images/"+$(this).attr('class')+".gif");
	}).each(function(){
		$("<img>").attr("src", "templates/ptcsense/images/"+$(this).attr('class')+"2.gif");
	});
});