$(document).ready(function(){





$("img.a").hover(
function() {
$(this).stop().animate({"opacity": "0"}, "slow");
},
function() {
$(this).stop().animate({"opacity": "1"}, "slow");
});










	$(".button1").hover(function() {
		$(this).attr("src","images/residential2.png");
			}, function() {
		$(this).attr("src","images/residential1.png");
	});
	


	$(".button2").hover(function() {
		$(this).attr("src","images/commercial2.png");
			}, function() {
		$(this).attr("src","images/commercial1.png");
	});
	














});