onbeforeunload与onunload事件

http://blog.163.com/chenmanyi0818@126/blog/static/200126020077751539150/
function windowonunload()
{
var xml = new ActiveXObject("Msxml2.XMLHTTP");
xml.open("POST","http://www.ht1s.com/member/grade/save.asp",false);
xml.Send("");
}