how to restrict postback on entire page in asp.net

Guess what, I found both answers with ggogle...

Ramesh Reddy11111 wrote:

how
to restrict postback on entire page in asp.ne

Remove the runat="server" attribute from the control

You can also add an onclick attribute to the control and return true i.e.

YourButton.Attributes.Add("onclick", "<script>return true</script>");

Ramesh Reddy11111 wrote:

how to get Datamember and ValueMembet value of selected item in combobox through JavaScript

<asp:TextBox ID="txtDate" runat="server"></asp:TextBox>
<img src="images\cal.gif" 
onclick="openCalendar(<% = txtDate.ClientID %>, 150, -150);return false;" />

A little more proper way would be:

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="images/cal.gif" />

protected void Page_Load(object sender, EventArgs e)
{
ImageButton1.OnClientClick = "openCalendar(" + TextBox1.ClientID + ", " + X.ToString() + ", " + Y.ToString() + ");return false;";
}