Detect fullscreen mode

Question

Modern desktop version of IE 10 is always fullscreen.

There is a living specification for :fullscreen pseudo-class on W3

But when I tried to det

Answer 1

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;
}