You also can't do open with Ctrl+O.
There's a bunch of Javascript on that page, and what it does is setup the document.location.search window to the URL specified to the search bar that you see...I think (I only spent about 5 minutes hunting for that, to see how they did it.)
I think there's info here:
http://scriptasylum.com/tutorials/fr...eredirect.html
if your interested in the details. Me, I already borrowed the scripts, I'm gonna take a closer look later.