$(document).ready(function(){
$('#top_navbar a')
	.mouseover(function(){
		$(this).stop().animate(
			{backgroundPosition:"(0 0)", padding:"1.2em 1.2em .4em 1.2em"}, 
			{duration:300})
		})
	.mouseout(function(){
		$(this).stop().animate(
			{backgroundPosition:"(0 -35px)", padding:".75em 1.2em .4em 1.2em"}, 
			{duration:100})
		});
	// enable tooltip for "download" element. use the "slide" effect 
    $(".event_item").tooltip({
			effect: 'slide', position: 'top left', offset: [10, -50], lazy: true, delay: 1
		});
});