Simple mobile-friendly online calculator in Javascript

Anything interesting about it?

(Apart from the fact that it allows decimal numbers like 127.0.0.1 and uses annyoing alert() boxes for error handling.)

Yeah, alert boxes aren't great I admit. I was aiming for the bare minimum of functionality but I could perhaps add nicer popups using script. It detects changes in browser window size and tries to redraw the button pad accordingly; and so should work well on mobile screens too though there are some width issues on iPod Touch.

Similar named http://www.calc5.com/ calculator. But could do much more

You think it could be as least as powerful as the standard Windows 7 calculator - which is actually pretty nice.

On the iPhone 4 iOs 4.1 it raises the keyboArd each time you press a button

cool. 1+1=3