From http://www.w3schools.com (Copyright Refsnes Data)

ASP.NET ValidationGroup Property

ImageButton Control Reference Complete ImageButton Control Reference

Definition and Usage

The OnClientClick property is used to sets a client side script to be run when the ImageButton control is clicked.

The script specified in this property is run by the ImageButton's event "OnClick" in addition to the predefined script.

Syntax

<asp:ImageButton OnClientClick="func" runat="server" />

Attribute Description
func Client side script to be run when ImageButton is clicked

Example

The following example runs two scripts when the ImageButton control is clicked:

<script runat="server">
Sub script1(obj As Object, e As ImageClickEventArgs)
  lblMsg.Text="Hello!"
End Sub
</script>

<form runat="server">
<asp:ImageButton OnClick="script1" OnClientClick="script2()"
ImageUrl="img.gif" runat="server" />
<br />
<asp:label id="lblMsg" runat="server" />
</form>

<script type="text/javascript">
function script2()
  {
  return confirm('Hello!');
  }
</script>

Show example »
ImageButton Control Reference Complete ImageButton Control Reference

From http://www.w3schools.com (Copyright Refsnes Data)