H5游戏之中方大和缩小屏幕的方法

方法一：

//全屏
    var docElm = document.documentElement;
    //W3C
    if(docElm.requestFullscreen) {
      docElm.requestFullscreen();
    }

    //FireFox
    else if(docElm.mozRequestFullScreen) {
      docElm.mozRequestFullScreen();
    }

    //Chrome等
    else if(docElm.webkitRequestFullScreen) {
      docElm.webkitRequestFullScreen();
    }

    //IE11
    else if(elem.msRequestFullscreen) {
      elem.msRequestFullscreen();
    }
    
    
    -----------
    
    //退出全屏
    
        //W3C
    if (document.exitFullscreen) {
      document.exitFullscreen();
    }
    //FireFox
    else if (document.mozCancelFullScreen) {
      document.mozCancelFullScreen();
    }
    //Chrome等
    else if (document.webkitCancelFullScreen) {
      document.webkitCancelFullScreen();
    }
    //IE11
    else if (document.msExitFullscreen) {
      document.msExitFullscreen();
    }

方法二：

//全屏
function requestFullScreen(element) {
  // 判断各种浏览器，找到正确的方法
var requestMethod = element.requestFullScreen || element.webkitRequestFullScreen || element.mozRequestFullScreen || element.msRequestFullScreen;
if (requestMethod) {
  requestMethod.call(element);
} else if (typeof window.ActiveXObject !== "undefined") { //for Internet Explorer
var wscript = new ActiveXObject("WScript.Shell");
if (wscript !== null) {
        wscript.SendKeys("{F11}");
                    }
                }
            }


//退出全屏 
    function exitFull() {
                // 判断各种浏览器，找到正确的方法
  var exitMethod = document.exitFullscreen || //W3C
      document.mozCancelFullScreen || //Chrome等
      document.webkitExitFullscreen || //FireFox
      document.webkitExitFullscreen; //IE11
    if (exitMethod) {
     exitMethod.call(document);
      } else if (typeof window.ActiveXObject !== "undefined") { //for Internet Explorer
    var wscript = new ActiveXObject("WScript.Shell");
    if (wscript !== null) {
    wscript.SendKeys("{F11}");
        }
    }
}