关于gridview 中的按钮调用js错误问题

Question

大家好.
我请教一个问题,我写的程序是这样写的,可是出现错误.请大家帮我看看,谢谢
XTGL.js
// JScript 文件
var xmlhttp;
function Createxmlhttp()
{
      //创建浏览器兼容的XMLHttpRequest对象
      try
      {
            xmlhttp= new ActiveXObject('Msxml2.XMLHTTP');
      }
      catch(e)
      {
            try
            {
                  xmlhttp= new ActiveXObject('Microsoft.XMLHTTP');
            }
            catch(e)
            {
                  try
                  {
                         xmlhttp= new XMLHttpRequest();
                  }
                  catch(e){}
            }
      }
 }function stopRole(code)
{
    Createxmlhttp();
    //定义XMLHttpRequest对象的事件处理程序
    xmlhttp.onreadystatechange=function()
    {
      if(xmlhttp.readyState==4)
      {
        if(xmlhttp.status==200)
        {
           //当加载成功时将内容显示于页面
           //content.innerHTML=xmlhttp.responseText;
           alert(xmlhttp.responseText);
         }
         else
         {
            //否则弹出错误信息
            alert(xmlhttp.status);
         }
      }
    }   
    var Posturl = "XTGLCommon.aspx?RoleID="+code+;
    alert(Posturl);
      //创建一个连接
      xmlhttp.open("get",Posturl);
      //发送请求
      xmlhttp.send(null); 
}
//role.aspx 页面
                   <asp:GridView ID="GVRole" runat="server" AllowPaging="True" AutoGenerateColumns="False" Width="432px" OnPageIndexChanging="GVRole_PageIndexChanging" OnRowCommand="GVRole_RowCommand">
                        <Columns>
                            <asp:BoundField DataField="RoleID" HeaderText="角色编号" >
                                <ControlStyle Width="100px" />
                            </asp:BoundField>
                            <asp:BoundField DataField="RoleName" HeaderText="角色名" >
                                <ControlStyle Width="100px" />
                            </asp:BoundField>
                            <asp:BoundField DataField="RoleDescription" HeaderText="备注" >
                                <ControlStyle Width="150px" />
                            </asp:BoundField>
                            <asp:CheckBoxField DataField="Forbid" HeaderText="是否禁用" >
                                <ItemStyle HorizontalAlign="Center" />
                            </asp:CheckBoxField>
                            <asp:TemplateField HeaderText="禁用" ShowHeader="False">
                                <ItemTemplate>
                                        <a href="javascript:void(0)" onclick='javascript:stopRole(<%# DataBinder.Eval(Container.DataItem,"RoleID") %>)'>停用</a>
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Center" />
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="启用" ShowHeader="False">
                                <ItemTemplate>
                                    <asp:ImageButton ID="btnactive" runat="server" CausesValidation="false" CommandName="active"  CommandArgument='<%# Eval("RoleID") %>'
                                        ImageUrl="~/img/activelogin.gif" Text="启用" />
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Center" />
                            </asp:TemplateField>
                        </Columns>
                        <RowStyle BackColor="#DEDFDE" />
                        <HeaderStyle CssClass="headcenter" />
                        <AlternatingRowStyle BackColor="White" BorderColor="White" />
                    </asp:GridView>
后台的XTGLCommon.aspx是这样的
    protected void Page_Load(object sender, EventArgs e)
    {
        SystemDataCommon.SetRole(Request.Form["RoleID"].ToString(), "", "", "F");
    }
运行的时候点击role.aspx页面上的"禁用"时.有网页有提示错误.js也不在后面传输..
请问是哪里有问题呢,