1.火狐报错：请求全屏已拒绝，至少一个文档包含的元素不是一个 iframe，或没有"allowfullscreen"属性。

2.TypeError: The expression cannot be converted to return the specified type.)

3.解决 (如果无法解决则选择第4)

解决:在iframe标签中添加 allowfullscreen="true"

 <iframe allowfullscreen="true" 
         src="#" width="100%" height="100%">
 </iframe>

4.自定义添加全屏点击事件

导入js[screenfull.min.js],源码如下

/*!
 * screenfull
 * v3.0.0 - 2015-11-24
 * (c) Sindre Sorhus; MIT License
 */
! function() {
  "use strict";
  var a = "undefined" != typeof module && module.exports,
      b = "undefined" != typeof Element && "ALLOW_KEYBOARD_INPUT" in Element,
      c = function() {
          for(var a, b, c = [
                  ["requestFullscreen", "exitFullscreen", "fullscreenElement", "fullscreenEnabled", "fullscreenchange", "fullscreenerror"],
                  ["webkitRequestFullscreen", "webkitExitFullscreen", "webkitFullscreenElement", "webkitFullscreenEnabled", "webkitfullscreenchange", "webkitfullscreenerror"],
                  ["webkitRequestFullScreen", "webkitCancelFullScreen", "webkitCurrentFullScreenElement", "webkitCancelFullScreen", "webkitfullscreenchange", "webkitfullscreenerror"],
                  ["mozRequestFullScreen", "mozCancelFullScreen", "mozFullScreenElement", "mozFullScreenEnabled", "mozfullscreenchange", "mozfullscreenerror"],
                  ["msRequestFullscreen", "msExitFullscreen", "msFullscreenElement", "msFullscreenEnabled", "MSFullscreenChange", "MSFullscreenError"]
              ], d = 0, e = c.length, f = {}; e > d; d++)
              if(a = c[d], a && a[1] in document) {
                  for(d = 0, b = a.length; b > d; d++) f[c[0][d]] = a[d];
                  return f
              }
          return !1
      }(),
      d = {
          request: function(a) {
              var d = c.requestFullscreen;
              a = a || document.documentElement, /5\.1[\.\d]* Safari/.test(navigator.userAgent) ? a[d]() : a[d](b && Element.ALLOW_KEYBOARD_INPUT)
          },
          exit: function() {
              document[c.exitFullscreen]()
          },
          toggle: function(a) {
              this.isFullscreen ? this.exit() : this.request(a)
          },
          raw: c
      };
  return c ? (Object.defineProperties(d, {
      isFullscreen: {
          get: function() {
              return Boolean(document[c.fullscreenElement])
          }
      },
      element: {
          enumerable: !0,
          get: function() {
              return document[c.fullscreenElement]
          }
      },
      enabled: {
          enumerable: !0,
          get: function() {
              return Boolean(document[c.fullscreenEnabled])
          }
      }
  }), void(a ? module.exports = d : window.screenfull = d)) : void(a ? module.exports = !1 : window.screenfull = !1)
}();
//监听调用方法 ；参数domId为需要全屏的div的id
function fullScreen(domId){
  var element=document.getElementById(domId);
  var requestMethod = element.requestFullScreen || element.webkitRequestFullScreen
  || element.mozRequestFullScreen || element.msRequestFullScreen;
          if(requestMethod) {
              requestMethod.call(element);
          } else if(typeof window.ActiveXObject !== "undefined") {
              var wscript = new ActiveXObject("WScript.Shell");
              if(wscript !== null) {
                  wscript.SendKeys("{Esc}");
              }
          }
} 

5.例子

<script src="screenfull.min.js"></script>
<div onclick="fullScreen("fullscreenId")">点击全屏</div>
<div> 
    <iframe allowfullscreen="true" 
         src="全屏的html链接" width="100%" height="100%">
 </iframe>
</div>