js 控制下拉菜单刷新的方法

思路：母版??藏控件 ?哪谌蓓?接收值 JS根??邮艿闹悼刂撇?雾?的???
母版?：
?藏控件：

  <asp:Label ID="Lbl_X" runat="server" Text="text" style="display:none"></asp:Label>
<asp:Label ID="Lbl_Xn" runat="server" Text="text" style="display:none"></asp:Label>
JS:
  <%-- ?置?中--%>
    <script type="text/javascript">
        var X = document.getElementById('<%=this.Lbl_X.ClientID %>').innerText;
        var Xn = document.getElementById('<%=this.Lbl_Xn.ClientID %>').innerText;
        var div = document.getElementById(X);
        if (div != null) {
            div.setAttribute("class", 'nav-top-item current');
        }
        var div2 = document.getElementById(Xn);
        if (div != null) {
            div2.setAttribute("class", 'current');
        }
    </script>
   

内容??母版??藏空??值：
  //?置母版?Lable的值，以控制菜?雾?CSS    
 

            Label X = (Label)this.Master.FindControl("Lbl_X");
            X.Text = "A";
            Label Xn = (Label)this.Master.FindControl("Lbl_Xn");
            Xn.Text = "A1";