Patent for pop-up

The following cross-post from my technical blog :
- I thought it was a myth, urban legend. But, no, it turns out to be true. On May 14, 2002, the US Patent Office granted patent number 6,389,458 to the following Javascript code:

function onExit ()
{
popup = window.open (“pop.html”);
popup.focus ();
}

I just read about it in the December issue of Communications of ACM - by the way, the source of very interesting articles.
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1. Patented Algorithms are bad, copyrighted software by Paul Watson, letter from Rod Oldehoeft - Communications of the ACM , December 2007 / Vol. 50, No. 12, p. 9-10.