Dan

> I have an image tag that sends tracking information to a server, I need
> to make sure that the page doesn't send more then once, even on a
> refresh of the page, or hitting the back button.

How about the following (ASP, but the principle should be sound):

If Not Session("trackingInfoChecked") = "Yes" Then
   'Do tracking stuff
   Session("trackingInfoChecked") = "Yes"
End If

Regards

Chris Marsh