document.observe('dom:loaded',  function() {

				   $$('.menu-item').each( function(element){
									 var img = element.down('img'); 
									 var src = img.src;
									 var srcHover = img.src.slice(0,-4)+'_a'+'.gif';
									 var images = document.createElement('img');
									 images.src = srcHover;
									 element.observe('mouseover', function() {
													 img.src = srcHover;
													 element.addClassName('hover');
													});
									 element.observe('mouseout', function() {
													  img.src = src;
													   element.removeClassName('hover');
													  });
									})
	});
	
	
	function buildings()

    {

    var curr = new Date(new Date() - new Date('01/01/2007'));

    var days = Math.round(curr.getTime() / 1000 / 60 / 60 / 24);



    document.write(14568 + days * 9);

    }