The problem I had was that I simplified the following script to make it easier to read and debug.
The script worked without errors in Chrome, Opera, Safari and Firefox even with FireBug.
Unfortunately IE8 through a wobbler because I had the Internet options "Display a notifcation about every script error" checked. The IE8 error was "Unterminated string constant".
Here is the script:
alt='Send This Page to Friend'
I eventually found the error which was to remove every single linefeed from the "width height, toolbar, etc".