function showGraffiti() {
	$('html').css({'background' : '#000 url(images/bg2.jpg) no-repeat center center fixed'});
	$('#close, #tag, #ad').css('display','block');
}

function hideGraffiti() {
	$('html').css({'background' : '#000 url(images/bg.jpg) no-repeat center center fixed'});
	$('#close, #tag, #ad').css('display','none');
}

function showCredits() {
	$('#close2, #ad2').css('display','block');
}

function hideCredits() {
	$('#close2, #ad2').css('display','none');
}