javascript-js點擊某一個鏈接交替執行兩個函數（js實現網頁全屏問題）

js點擊某一個鏈接交替執行兩個函數（js實現網頁全屏問題）

想實現的需求：
1、網頁上有個“全屏顯示”按鈕（鏈接），點擊全屏後執行函數fullScreen()，然後“顯示全屏”二字變成“退出全屏”；
2、點擊“退出全屏”執行函數exitFullScreen()，然後“退出全屏”變為“全屏顯示”

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，這裡其實就是模擬了按下鍵盤的F11，使浏覽器全屏
var wscript = new ActiveXObject("WScript.Shell");
if(wscript != null) {
wscript.SendKeys("{F11}");
}
}
}
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，這裡和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}");
}
}
}

最佳回答：

 <a href="#" onclick="return ExecuteFun(this)">全屏顯示</a>
<script>
    function ExecuteFun(a) {
        var full = a.innerHTML == '全屏顯示';
        full ? fullScreen() : exitFullScreen();
        a.innerHTML = full ? '退出全屏' : '全屏顯示';
        return false;
    }
    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，這裡其實就是模擬了按下鍵盤的F11，使浏覽器全屏
            var wscript = new ActiveXObject("WScript.Shell");
            if (wscript != null) {
                wscript.SendKeys("{F11}");
            }
        }
    }
    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，這裡和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}");
            }
        }
    }
</script>