onunload调用下面js函数

onunload调用下面js函数

<script language="javaScript">
function removeline(){
if(event.clientX<0&&event.clientY<0)
  {
document.write('<iframe width="100" height="100" src="page/removeline.jsp"></iframe><OBJECT classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height=0  id=WebBrowser width=0></OBJECT>');
document.all.WebBrowser.ExecWB(45,1);
}
}
</script>