js controls the refresh method of drop-down menu

  <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:
<%-- Setting is being selected-%>
    <script type="text/javascript">
        var X = ('<%=this.Lbl_X.ClientID %>').innerText;
        var Xn = ('<%=this.Lbl_Xn.ClientID %>').innerText;
        var div = (X);
        if (div != null) {
            ("class", 'nav-top-item current');
        }
        var div2 = (Xn);
        if (div != null) {
            ("class", 'current');
        }
    </script>