iPhone/Mobile Safari: Getting a reliable viewport height

Question

Is there a way to get a reliable viewport height value from mobile Safari? I've been struggling for days now and I know that I am not the only one with this problem.
Even toolkits like http://responsejs.com didn't help me. How to Sencha Touch or Kendo UI get the screen height, does somebody know that? Is that reliable?

Answer 1

I always use this: http://docs.sencha.com/touch/2-1/#!/api/Ext.viewport.Default-method-getWindowHeight

Ext.Viewport.getWindowHeight();