$(document).ready(function() {
	$('.nav_button a').hover(
		function () {
			$(this).css('background-image',"url('public/themes/ziegler_electric/images/nav_button_selected.jpg')");
		},
		function () {
			$(this).css('background-image',"url('public/themes/ziegler_electric/images/nav_button.jpg')");
		});	
});