how to hide panel and controls in asp.net

You can hide panel and controls two way.
1) using visible=true/false property
2) using jquery

Below are the explanation with example:
1) using visible=true/false property :

<asp:Panel ID="Panel1" runat="server" Visible="false">
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
    </asp:Panel>

2) using jquery

<script type="text/javascript">
       $("#ctl00_contentdetails_pnl").hide();
   </script>