Show confirmation before deleting record in gridview row

How to show a confirmation before deleting a records in gridview?

If user confirm only then delete.

If Say No then don't take any action and even don't postback the page.

Any easy way to do this?

See OnClientClick, only that part you need

<asp:ImageButton ID="ibtnDelete" runat="server" 
   ImageUrl="/Images/H_delete.png" 
   ToolTip="Delete" 
   OnClientClick="return confirm('Do you want to permanently delete this record?');"
   OnClick="ibtnDeleteUser_Click" />

you need to use:

OnClientClick="javascript:return confirm('Are you sure you want to Remove this Record!');"