Jquery菜单2

   <script src="js/jquery-1.3.2.min.js" type="text/javascript"></script>
    <script type="text/javascript"> 
$(document).ready(function(){
    $("ul.subnav").parent().append("<span></span>"); //Only shows drop down trigger when js is enabled - Adds empty span tag after ul.subnav
    $("div.topnav li span").click(function() { //点击span后显示的菜单...
        
        //Following events are applied to the subnav itself (moving subnav up and down)
        $(this).parent().find("ul.subnav").slideDown('fast').show(); //Drop down the subnav on click

        $(this).parent().hover(function() {
        }, function(){    
            $(this).parent().find("ul.subnav").slideUp('slow'); //When the mouse hovers out of the subnav, move it back up
        });
        //Following events are applied to the trigger (Hover events for the trigger)
        }).hover(function() { 
            $(this).addClass("subhover"); //On hover over, add class "subhover"
        }, function(){    //On Hover Out
            $(this).removeClass("subhover"); //On hover out, remove class "subhover"
    });
});
    </script>

    <style type="text/css">
        body
        {
            margin: 0;
            padding: 0;
            font: 10px normal Arial, Helvetica, sans-serif;
            background: #000 url(body_bg.gif) repeat-x;
        }
        .container
        {
             960px;
            margin: 0 auto;
            position: relative;
        }
        #header
        {
            background: url(header_bg.gif) no-repeat center top;
            padding-top: 120px;
        }
        #header .disclaimer
        {
            color: #999;
            padding: 100px 0 7px 0;
            text-align: right;
            display: block;
            position: absolute;
            top: 0;
            right: 0;
        }
        #header .disclaimer a
        {
            color: #ccc;
        }
        div.topnav
        {
            list-style: none;
            padding: 0 20px;
            margin: 0;
            float: left;
             920px;
            background: #222;
            font-size: 1.2em;
            background: url(topnav_bg.gif) repeat-x;
        }
        div.topnav li
        {
            float: left;
            margin: 0;
            padding: 0 15px 0 0;
            position: relative; /*--Declare X and Y axis base--*/
        }
        div.topnav li a
        {
            padding: 10px 5px;
            color: #fff;
            display: block;
            text-decoration: none;
            float: left;
        }
        div.topnav li a:hover
        {
            background: url(topnav_hover.gif) no-repeat center top;
        }
        div.topnav li span
        {
            /*--Drop down trigger styles--*/
             17px;
            height: 35px;
            float: left;
            background: url(subnav_btn.gif) no-repeat center top;
        }
        div.topnav li span.subhover
        {
            background-position: center bottom;
            cursor: pointer;
        }
        /*--Hover effect for trigger--*/div.topnav li ul.subnav
        {
            list-style: none;
            position: absolute; /*--Important - Keeps subnav from affecting main navigation flow--*/
            left: 0;
            top: 35px;
            background: #333;
            margin: 0;
            padding: 0;
            display: none;
            float: left;
             170px;
            -moz-border-radius-bottomleft: 5px;
            -moz-border-radius-bottomright: 5px;
            -webkit-border-bottom-left-radius: 5px;
            -webkit-border-bottom-right-radius: 5px;
            border: 1px solid #111;
        }
        div.topnav li ul.subnav li
        {
            margin: 0;
            padding: 0;
            border-top: 1px solid #252525; /*--Create bevel effect--*/
            border-bottom: 1px solid #444; /*--Create bevel effect--*/
            clear: both;
             170px;
        }
        html div.topnav li ul.subnav li a
        {
            float: left;
             145px;
            background: #333 url(dropdown_linkbg.gif) no-repeat 10px center;
            padding-left: 20px;
        }
        html div.topnav li ul.subnav li a:hover
        {
            /*--Hover effect for subnav links--*/
            background: #222 url(dropdown_linkbg.gif) no-repeat 10px center;
        }
        #header img
        {
            margin: 20px 0 10px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div class="container">
        <div id="header">
            <div class="disclaimer">
            </div>
            <div class="topnav">
                <li><a href="#">Home</a></li>
                <li><a href="#">Tutorials</a>
                    <ul class="subnav">
                        <li><a href="#">11111</a></li>
                        <li><a href="#">22222</a></li>
                        <li><a href="#">33333</a></li>
                        <li><a href="#">44444</a></li>
                        <li><a href="#">55555</a></li>
                    </ul>
                </li>
                <li><a href="#">Resources</a>
                    <ul class="subnav">
                        <li><a href="#">123456</a></li>
                        <li><a href="#">456789</a></li>
                    </ul>
                </li>
                <li><a href="#">About Us</a></li>
                <li><a href="#">Advertise</a></li>
                <li><a href="#">Submit</a></li>
                <li><a href="#">Contact Us</a></li>
            </div>
        </div>
    </div>
    </form>
</body>
</html>