Orientationchange

Hi,

How To stop Orientationchange in sench touch 2.0...???

There is no event for Orientation :(

Unfortunately this is not possible in the browser.

But i need for mobile and ipad not for browser...............

Sencha touch2.0 has no event for Orientationchange :(
then how can i fix the orientation at portrait ????

I want to know the reason, why it is not possible .... :(

And if anyone know, that how to prevent application from orientation then please help me..... its very urgent :(