浏览器窗口关闭事件的监听搜集

方式一：(适用与IE浏览器，而且刷新不提示，只在点击浏览器关闭按钮的时候提示)
<script type="text/javascript">
window.onbeforeunload=onclose;
function onclose()
{
if(event.clientX>document.body.clientWidth&&event.clientY<0||event.altKey)
{
return "您要离开吗？";
}
}
</script>
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方式二：适用与IE和FF，不区分刷新和关闭
<script type="text/javascript">  
   
    window.onbeforeunload = onbeforeunload_handler;  
    window.onunload = onunload_handler;  
    function onbeforeunload_handler(){  
        var warning="确认退出?";          
        return warning;  
    }  
      
    function onunload_handler(){  
        var warning="谢谢光临";  
        alert(warning);  
    }  
 
</script>  
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方式三：适用与IE和FF，不区分刷新和关闭，最简单的
<script type="text/javascript">
window.onbeforeunload=onclose;
function onclose()
{ 
return "您确定退出吗？";

}
</script>
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方式四：适用与IE和FF，不区分刷新和关闭，稍复杂的
<script language="javascript">
var MSG_UNLOAD="如果你此时离开档案系统，所做操作信息将全部丢失，是否离开?";

var UnloadConfirm = {};

//启用监听浏览器刷新、关闭的方法
UnloadConfirm.set = function(confirm_msg){
    window.onbeforeunload = function(event){
        event = event || window.event;
        event.returnValue = confirm_msg;
    }
}

//关闭监听浏览器刷新、关闭的方法

UnloadConfirm.clear = function(){
    window.onbeforeunload = function(){};
}
UnloadConfirm.set(MSG_UNLOAD);

</script>
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方式五：只适用于IE6下的关闭按钮和快捷键关闭的，刷新不提示
<script type="text/javascript">
window.onbeforeunload=onclose;
function onclose()
{ 
var warnning = '<fmt:message key="systemMessage.exitWarning" />';
var beforeExit='<fmt:message key="systemMessage.beforeExitWarning" />';
  if(event.clientY<0  &&  event.clientX>document.body.clientWidth-20  ||  event.clientY<0  &&  event.clientX<20  ||
event.altKey || event.ctrlKey ||  event.clientY>document.body.clientHeight){

alert(beforeExit);
return warnning;
}     
}
</script>
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另附判断浏览器类型的JS
<script type="text/javascript">
        var Sys = {};
        var ua = navigator.userAgent.toLowerCase();
   &