Find out user's screen size ?

Is it possible to find out the size of the user's current browser window in pixels in WebDynpro for ABAP?

(i need this because I have a popup that is 100% high and 100% wide (works well), and on that popup I want to add a GANTT control with 100% width and height as well. Unfortunately, the CHART control does not accept a dynamical height (100% width works, but 100% height is not suported).