<form runat="server">
    <asp:Panel ID="Panel1" runat="server">
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>
    </asp:Panel>
    <input type="button" value="按扭" onclick="toggle()" />

    <script type="text/javascript">
   function toggle()
   {
       var p = document.getElementById("<%=Panel1.ClientID %>");
       p.style.display = p.style.display == 'none' ? 'block' : 'none'
   }
    </script>

    </form>