Modern desktop version of IE 10 is always fullscreen.
There is a living specification for :fullscreen pseudo-class on W3
:fullscreen
But when I tried to det
It is working in IE 8 and I am writing a specific web page for IE 8. I do not need to check if the other browsers support this or not.
function isFullScreen(){ return window.screenTop == 0 ? true : false; }