function mainmenu(){
$(" .menutable ul ").css({display: "none"}); // Opera Fix
$(" .menutable li").mouseenter(function(){
		$(this).find('ul:first').css({visibility: "visible",display: "none"}).stop(true, true).slideDown("slow");
		 });
$(" .menutable li").mouseleave(function(){
		$(this).find('ul:first').css({visibility: "visible"}).stop(true, true).slideUp("fast");
		})
}

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