function unload() {
	var userInfo = "";
	var oBao = new ActiveXObject("Microsoft.XMLHTTP");
	oBao.open("POST", "memberUser_deleteCookies.action", false);
	oBao.setRequestHeader("Content-Type",
			"application/x-www-form-urlencoded");
	oBao.send(userInfo);
}
//判断当前页面是刷新还是关闭   
function   onclose(){   
if(event.clientX<=0&&   event.clientY   <   0){//>0是刷新,<=0是关闭当前页     
                        unload();   
                  }else{   
                    ;   
                  }   
}