$(document).ready(function(){
	$('#visitors').mouseover(function(){
		$('#visitorsMenu').removeClass('hidden');	
	});
	$('#visitors').mouseout(function(){
		$('#visitorsMenu').addClass('hidden');
	});
	$('#exhibitors').mouseover(function(){
		$('#exhibitorsMenu').removeClass('hidden');
	});
	$('#exhibitors').mouseout(function(){
		$('#exhibitorsMenu').addClass('hidden');
	});
	$('#symposium').mouseover(function(){
		$('#symposiumMenu').removeClass('hidden');
	});
	$('#general').mouseout(function(){
		$('#symposiumMenu').addClass('hidden');	
	});
});