[javascript] How to make the window full screen with Javascript (stretching all over the screen)

This code also includes how to enable full screen for Internet Explorer 9, and probably older versions, as well as very recent versions of Google Chrome. The accepted answer may also be used for other browsers.

var el = document.documentElement
    , rfs = // for newer Webkit and Firefox
           el.requestFullscreen
        || el.webkitRequestFullScreen
        || el.mozRequestFullScreen
        || el.msRequestFullscreen
;
if(typeof rfs!="undefined" && rfs){
  rfs.call(el);
} else if(typeof window.ActiveXObject!="undefined"){
  // for Internet Explorer
  var wscript = new ActiveXObject("WScript.Shell");
  if (wscript!=null) {
     wscript.SendKeys("{F11}");
  }
}

Sources: