$(document).ready(function(){
	$(".button_twitter_home").hover(function() {
		$(this).attr("src","images/sub_structure/button_twitter_on.png");
			}, function() {
		$(this).attr("src","images/sub_structure/button_twitter_off.png");
	});
});

$(document).ready(function(){
	$(".button_facebook_home").hover(function() {
		$(this).attr("src","images/sub_structure/button_facebook_on.png");
			}, function() {
		$(this).attr("src","images/sub_structure/button_facebook_off.png");
	});
});

$(document).ready(function(){
	$(".button_twitter_sub").hover(function() {
		$(this).attr("src","../images/sub_structure/button_twitter_on.png");
			}, function() {
		$(this).attr("src","../images/sub_structure/button_twitter_off.png");
	});
});

$(document).ready(function(){
	$(".button_facebook_sub").hover(function() {
		$(this).attr("src","../images/sub_structure/button_facebook_on.png");
			}, function() {
		$(this).attr("src","../images/sub_structure/button_facebook_off.png");
	});
});

$(document).ready(function(){
	$(".button_jobs").hover(function() {
		$(this).attr("src","../images/sub_structure/button_jobs_on.png");
			}, function() {
		$(this).attr("src","../images/sub_structure/button_jobs_off.png");
	});
});