$(document).ready(function(){
	var timer;

	var mouseout = function() {
		clearInterval(timer);

		var rand = parseInt(Math.random()+0.5);
		$("#visualhome").css("background-position", "0 -"+(rand*2000)+"px");
	};

	var timerfunction = function() {timer = setInterval(mouseout, 50)};

	$("#navigation ul.level-1 > li:nth-child(1)").hover(function() {
		clearInterval(timer);
		$("#visualhome").css("background-position", "0 -500px");
	}, timerfunction);
	$("#navigation ul.level-1 > li:nth-child(2)").hover(function() {
		clearInterval(timer);
		$("#visualhome").css("background-position", "0 -1000px");
	}, timerfunction);
	$("#navigation ul.level-1 > li:nth-child(3)").hover(function() {
		clearInterval(timer);
		$("#visualhome").css("background-position", "0 -1500px");
	}, timerfunction);


	$("#navigation ul li").hover(
		function() {
			$('ul', $(this)).stop(true, true).slideDown('slow');
			$(this).toggleClass('selected');
		},

		function() {
			$('ul', $(this)).stop(true, true).slideUp("fast");
			$(this).toggleClass('selected');
	});
});