If you find the code snippet:
<body onload="self.focus()">not work in Firefox 2, this is not a bug. Firefox has an advanced Javascript option called “Raise or lower windows” which is deactivated by default. You may find this option under:
- Tools
- Options…
- Content tab
- Advanced button next to “Enable JavaScript”
Once enabled the above code will work again. But only on your Firefox. So you might want to rethink if that popup stuff is really what your users want 
Nice!
By: Harry on November 27, 2006
at 9:42 am