怎么当用户点击,ie浏览页上面的关闭按钮,也响应我得程序,例如alert("close");

Question

<script languange=javascript>
document.onbeforeunload=function() {alert('close');}
</script>

Answer 1

<script languange=javascript>
document.onunload=function() {alert('close');}
</script>

Answer 2

<script languange=javascript>
window.onunload=function() {alert('close');}
</script>
===============================
<script languange=javascript>
window.onbeforeunload=function() {alert('close');}
</script>

Answer 3

onunload与onbeforeunload有什么区别?
为什么onunload可以,onbeforeunload不想应?

Answer 4

onunload是退出时响应，onbeforeunload是退出之前响应
--------------------------------------------<script language=javascript>
function window.onbeforeunload()
{
if (event.clientX>document.body.clientWidth && event.clientY<0||event.altKey){
  window.event.returnValue="确定要退出本页吗？";
}
</script>

Answer 5

onunload
离开本页onbeforeunload
关闭浏览器