function ustmenu(){
$(" #nav ul ").css({display: "none"}); // Opera icin
$(" #nav li").hover(function(){
	$(this).find('ul:first').css({visibility: "visible",display: "none"}).slideDown(50);
	},function(){
	$(this).find('ul:first').css({visibility: "hidden"});
	});
} 
 
$(function(){					
	ustmenu();
});