function mainmenu(){
$m(" #nav a").removeAttr("title");
$m(" #nav ul ").css({display: "none"}); // Opera Fix
$m(" #nav li").hover(function(){
		$m(this).find('ul:first').css({visibility: "visible",display: "none"}).show(400);
		},function(){
		$m(this).find('ul:first').css({visibility: "hidden"});
		});
}