$(document).ready(function(){
	mainmenu();
      function mainmenu(){
   	$("#main-nav ul").css({display: "none"}); //Opera Fix
   	$("#main-nav li").hover(function(){
   		$(this).find('ul:first:hidden').css({visibility: "visible",display: "none"}).fadeIn(300);
   		},function(){
   		$(this).find('ul:first').css({visibility: "hidden"});
   		});
   	};
   	
});