<script language="javascript">
window.onbeforeunload = function(){
with(window.event){
if(clientY < 0 && clientX > document.body.clientWidth || altKey){
alert("Close");
}
}
}
</script>
JavaScript 页面卸载警告
<script language="javascript">
window.onbeforeunload = function(){
with(window.event){
if(clientY < 0 && clientX > document.body.clientWidth || altKey){
alert("Close");
}
}
}
</script>

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