ASP.Net Link Button not working in Firefox (Version 8) - asp.net

Question

I have developed an ASP.NET application to use in Facebook. It has a simple link button which is used to work as expected in older versions of Firefox.
<asp:LinkButton ID="lbtnLogOut" runat="server">Disconnect</asp:LinkButton>
Protected Sub lbtnLogOut_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles lbtnLogOut.Click
Response.Redirect(Request.ApplicationPath & "/login.aspx")
End Sub
After upgrading Firefox to 8, I noticed Link Button is not working i.e the button is not causing Post Back. When I view the source code, the Javascript code for Link Button to cause Post Back is
<script type="text/javascript">
//<![CDATA[
var theForm = document.forms['form1'];
if (!theForm) {
theForm = document.form1;
}
function __doPostBack(eventTarget, eventArgument) {
if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
theForm.__EVENTTARGET.value = eventTarget;
theForm.__EVENTARGUMENT.value = eventArgument;
theForm.submit();
}
}
//]]>
</script>
I used Firebug to debug the above code but _doPostBack function is not firing when I clicked on Link Button. It is working in all other browsers (IE 9, Google Chrome, Safari) though.
Note: I am using this ASP.Net web application as App inside Facebook. Facebook basically displays this website inside it using iFrame.
There is a similar question here, but it does not provide any solution to me.
Wondering the issue is caused by Facebook iFrame or Firefox? Any help would be appreciated.

Answer 1

It doesn't look like you're assigning an event handler to the LinkButton.
<asp:LinkButton ID="LinkButton1" runat="server" Text="Click" OnClick="LinkButton1_Click" />
The JavaScript you posted is the __doPostBack function, which is not exclusive to the LinkButton. You are correct in the sense that LinkButtons use __doPostBack to trigger postbacks, but the function won't be called unless you assign an event handler to the LinkButton.
For debugging purposes, I would also set CausesValidation to false, just to make sure that validation doesn't interfere with the click event.

Answer 2

Just use this code in your .master file or other appriopiate file just before the end </body> tag:
<script language="javascript" type="text/javascript">
<!--
function __doPostBack(eventTarget, eventArgument) {
var theform;
if (window.navigator.appName.toLowerCase().indexOf("microsoft") > -1) {
theform = document.aspnetForm;
}
else {
theform = document.forms["aspnetForm"];
}
theform.__EVENTTARGET.value = eventTarget.split("$").join(":");
theform.__EVENTARGUMENT.value = eventArgument;
theform.submit();
}
// -->
</script>
Replace 'aspnetForm' with your own.