function mainmenu(){

$(" #nav ul ").css({display: "none"}); // Opera Fix
$(" #nav li").hover(function(){

$(this).find('ul:first').css({visibility: "visible",display: "none"}).show( 'drop', { direction: "left" }, 500);
 
},
		
	function(){
		$(this).find('ul:first').css({visibility: "hidden"});
	 });
}

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