function mainmenu(){
//$(" #nav a").removeAttr("title");
//$(" #nav ul ").css({display: "none"}); // Opera Fix
$(pageNum).addClass("active")  
$(" #nav li").hover(function(){// here goes mouse over effect
		$(this).find('ul:first').css({visibility: "visible",display: "none"}).show(400);
		},function(){// here goes mouse out effect
		$(this).find('ul:first').css({visibility: "hidden"});
		});
}
 $(document).ready(function(){					
	mainmenu();
});