function mainmenu(){
$(" #nav ul ").css({display: "none"}); // Opera Fix
$(" #nav li").hover(function(){
		$(this).find('ul:first').css({visibility: "visible",display: "none"}).show(400);
		},function(){
		$(this).find('ul:first').css({visibility: "hidden"});
		var spanref=document.createElement("span")
		spanref.className="arrow"
		spanref.innerHTML="  "
		ultags[t].parentNode.getElementsByTagName("a")[0].appendChild(spanref)
		});
}

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