//關(guān)閉瀏覽器提示信息window.onbeforeunload = function (e) {  e = e || window.event;  var y = e.clientY;  if (y <= 0//點擊瀏覽器或者選項卡的關(guān)閉按鈕  || y >= Math.max(document.body ? document.body.clientHeight : 0, document.documentElement ? document.documentElement.clientHeight : 0)//點擊任務(wù)欄的關(guān)閉按鈕  ) {    //IE 和 Firefox     e.returnValue = "確定要刷新或關(guān)閉瀏覽器窗口？";  }  //谷歌  return "確定要刷新或關(guān)閉瀏覽器窗口？";}