// Source :
// http://www.kriesi.at/archives/create-a-multilevel-dropdown-menu-with-css-and-improve-it-via-jquery
function mainmenu(){
$(" #nav div ").css({display: "none"}); // Opera Fix
$(" #nav span").hover(function(){
		$(this).find('div:first').css({visibility: "visible",display: "none"}).show(400);
		},function(){
		$(this).find('div:first').css({visibility: "hidden"});
		});
}

 
 
 $(document).ready(function(){					
	mainmenu();
});