function fullScreen(element) { 
  if(element.requestFullScreen) { 
  element.requestFullScreen(); 
 } else if(element.webkitRequestFullScreen ) { 
   element.webkitRequestFullScreen(); 
  } else if(element.mozRequestFullScreen) { 
  element.mozRequestFullScreen(); 
 } 
 } 

$('html').on('click keypress', 'a', function(event) { 
  // 不响应真正的A HREF点击事件 
 event.preventDefault(); 
  event.stopPropagation(); 
  // Trigger fullscreen 
  if (elementPrototype.requestFullscreen) { 
   document.documentElement.requestFullscreen(); 
  } else if (elementPrototype.webkitRequestFullScreen) { 
   document.documentElement.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT); 
  } else if (elementPrototype.mozRequestFullScreen) { 
   document.documentElement.mozRequestFullScreen(); 
  } else { 
   // 
  } 
  //显示假的UI 
  $('#menu, #browser').show(); 
  $('#target-site').show(); 
 }); 

// 判断各种浏览器，找到正确的方法
function launchFullscreen(element) {
 if(element.requestFullscreen) {
  element.requestFullscreen();
 } else if(element.mozRequestFullScreen) {
  element.mozRequestFullScreen();
 } else if(element.webkitRequestFullscreen) {
  element.webkitRequestFullscreen();
 } else if(element.msRequestFullscreen) {
  element.msRequestFullscreen();
 }
}
// 启动全屏!
launchFullScreen(document.documentElement); // 整个网页
launchFullScreen(document.getElementById("videoElement")); // 某个页面元素

// 判断浏览器种类
function exitFullscreen() {
 if(document.exitFullscreen) {
  document.exitFullscreen();
 } else if(document.mozCancelFullScreen) {
  document.mozCancelFullScreen();
 } else if(document.webkitExitFullscreen) {
  document.webkitExitFullscreen();
 }
}
// 退出全屏模式!
exitFullscreen();

var fullscreenElement = document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement;
var fullscreenEnabled = document.fullscreenEnabled || document.mozFullScreenEnabled || document.webkitFullscreenEnabled;

-webkit-full-screen {

 /* properties */
}
:-moz-full-screen {
 /* properties */
}
:-ms-fullscreen {
 /* properties */
}
:full-screen { /*pre-spec */
 /* properties */
}
:fullscreen { /* spec */
 /* properties */
}
/* deeper elements */
:-webkit-full-screen video {
 width: %;
 height: %;
}
/* styling the backdrop*/
::backdrop {
 /* properties */
}
::-ms-backdrop {
 /* properties */
}