var $ = jQuery.noConflict();
$(document).ready(function() {
        /* for top navigation */
        $(" #menu ul ").css({display: "none"}); // Opera Fix
        $(" #menu li").hover(function(){
        $(this).find('ul:first').css({visibility: "visible",display: "none"}).slideDown(400);
        },function(){
        $(this).find('ul:first').css({visibility: "hidden"});
        });
        
});