JavaScript implementation control browser Full-screen _javascript tips

The function is very simple, the code is also very concise, here is not much nonsense

function fullscreen () {
  var el = document.documentelement,
    RFS = El.requestfullscreen | | El.webkitrequestfullscreen | | El.mozrequestfullscreen | | El.msrequestfullscreen,
    WScript;
 
  if (typeof RFS!= "undefined" && RFS) {
    rfs.call (EL);
    return;
  }
 
  if (typeof window. ActiveXObject!= "undefined") {
    wscript = new ActiveXObject ("Wscript.Shell");
    if (wscript) {
      WScript. SendKeys (' {F11} ');
 
}} function Exitfullscreen () {
  var el = document,
    CFS = El.cancelfullscreen | | el.webkitcancelfullscreen | | el.moz Cancelfullscreen | | El.exitfullscreen,
    WScript;
 
  if (typeof cfs!= "undefined" && cfs) {
   cfs.call (EL);
   return;
  }
 
  if (typeof window. ActiveXObject!= "undefined") {
    wscript = new ActiveXObject ("Wscript.Shell");
    if (wscript!= null) {
      WScript. SendKeys (' {F11} ');}}

The above mentioned is the entire content of this article, I hope you can enjoy.