鼠标移动到菜单上，显示下拉菜单，帮忙看看这个js哪里写的有问题

Question

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Uctop.ascx.cs" Inherits="Uctop" %>
<link href="css/css.css" rel="stylesheet" type="text/css" />
<style type="text/css">
body {
background-color: #999999;
}
</style>
<script src="js/jquery-1.4.2-vsdoc.js" type="text/javascript"></script>
<script src="js/jquery-1.7.2.js" type="text/javascript"></script>
<script type="text/javascript">
    $(function () {
        $("#menuli").mousemove(function () {
            $.post("menu.ashx", { "menuvalue": $("#menuli").val() }, function (data, staus) {
                var comments = $.parseJSON(data);
                $("#ulComment").empty();
                for (var i = 0; i < comments.length; i++) {
                    var comment = comments[i];
                    var li = "<li><a href='HomeDetail.aspx?pk=" + comment.ID + "&tablename=" + comment.TableName + "'>" + comment.Field + "</a></li>";
                    $("#ulComment").append(li);
                }
            });
        });
    });
</script>
<style type="text/css">
    #div_scrool  { float: left;width: 903px; height: 226px;  overflow: hidden;    position: relative; margin: 0px; margin-left: 3px; padding: 0px; }
    #div_scrool ul {position: absolute;width: 2000px;margin: 0px;  padding: 0px;    }
    #div_scrool ul li  { float: left; position: relative;  list-style: none;margin: 0px;    }
</style><center>
<div class="logo"><img alt="" src="images/1.jpg" width="1258" height="110" /></div>
<div class="logo_1">
 <div id="div_scrool">
            <ul id="scrool_wrap">
                <asp:Repeater ID="rptMenu" runat="server">
                    <ItemTemplate>
                        <li style=" background-image:url(images/2.jpg);">
                        <td align="center" valign="middle"><img  alt="" src="images/3.jpg"></td>
    <td align="center" valign="middle" class="top" onmouseover="this.className='toppl'" onmouseout="this.className='top'"></td>
                             <a  id="menuli" href="<%--CaseDetail.aspx?i=<%# DataBinder.Eval(Container.DataItem,"FID") %>--%>">
                                        <%# DataBinder.Eval(Container.DataItem,"Menu") %></a></div>
                            
                        </li>
                    </ItemTemplate>
                </asp:Repeater>
            </ul>
        </div>
</div>
<!--下拉列表-->
<div class="xl">
 <div class="xl1">
     <ul id="ulComment">            
      </ul>
 </div>
 </div>
<!--flash图片-->
<div class="top1"><img alt="" src="images/4.jpg" width="1258" height="369" /></div>
</center>