js 全屏 退出全屏

直接上代碼：

全屏

function fullScreen() {
  var el = document.documentElement;
  var rfs = el.requestFullScreen || el.webkitRequestFullScreen || 
      el.mozRequestFullScreen || el.msRequestFullScreen;
  if(typeof rfs != "undefined" && rfs) {
    rfs.call(el);
  } else if(typeof window.ActiveXObject != "undefined") {
    //for IE，這裏其實就是模擬了按下鍵盤的F11，使瀏覽器全屏
    var wscript = new ActiveXObject("WScript.Shell");
    if(wscript != null) {
        wscript.SendKeys("{F11}");
    }
  }
}
```

退出全屏

```javascript
function exitFullScreen() {
  var el = document;
  var cfs = el.cancelFullScreen || el.webkitCancelFullScreen || 
      el.mozCancelFullScreen || el.exitFullScreen;
  if(typeof cfs != "undefined" && cfs) {
    cfs.call(el);
  } else if(typeof window.ActiveXObject != "undefined") {
    //for IE，這裏和fullScreen相同，模擬按下F11鍵退出全屏
    var wscript = new ActiveXObject("WScript.Shell");
    if(wscript != null) {
        wscript.SendKeys("{F11}");
    }
  }
}

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