A lot of traffic is coming to this page although it does not exist any more…

So I re-created it with some links that might help you find what you are looking for, instead of giving you a 404 page.

orientationchange() on windows phone browser – Stack Overflow

Managing the Windows Phone Browser Viewport – The Windows Blog

Orientation detection in your Windows Phone 7 – Maragna.net

Working with Mobile Device Orientation Detection – Code Review

Browser compatibility — viewports – QuirksMode