判斷浏覽器是重新整理還是關閉的js代碼

<script type="text/javascript">

    window.onbeforeunload = function () {

        var n = window.event.screenX - window.screenLeft;

        var b = n > document.documentElement.scrollWidth - 20;

        if (b && window.event.clientY < 0 || window.event.altKey) {

            alert("是關閉而非重新整理");          

            window.event.returnValue = "人";  // 這裡可以放置你想做的操作代碼     

        } else {

            alert("是重新整理而非關閉");

        }

    }

</script>

轉載于:https://www.cnblogs.com/wgx0428/archive/2012/03/09/2387855.html