$(document).ready(function(){
	$('.up_image').hover(function() {
		$(this).attr("src","/images/up2.gif");
			}, function() {
		$(this).attr("src","/images/up1.gif");
	});

	$('.bug_image').hover(function() {
		$(this).attr("src","/images/bug2.gif");
			}, function() {
		$(this).attr("src","/images/bug1.gif");
	});
});