function user_status(){
		var url = "/us.htm?rand=" + Math.random();
		var ajaxobj = new AJAXRequest;
		ajaxobj.method = "GET";
		ajaxobj.url = url;
		ajaxobj.callback = function(response){
			var userInfo = eval("(" + response.responseText + ")");
			var user_content = "";
			show_user_info(userInfo.userName);
		};
		ajaxobj.send();
}
function show_user_info(s){
		var user_content = "";
		if (s == "-1"){//未登录
			user_content = "<a href=\"/login.htm?action=Login\">登录</a>&nbsp;&nbsp;|&nbsp;&nbsp;<a href=\"http://passport.mapabc.com/reg.htm?targetUrl=" + location.href + "&rf=mapabc\" target=\"_blank\">注册</a>&nbsp;&nbsp;";
		}else{//已登录
			user_content = "<table border='0' cellspacing='0' cellpadding='0'><tr><td>您好，</td><td><strong>" + s + "&nbsp;&nbsp;</strong></td><td width='50' ><a href='http://passport.mapabc.com/my.htm'>我的帐户</a></td><td><a href='/sso_logout.jsp?targetUrl=http://code.mapabc.com/index.shtml'>退出</a></td></tr></table>";
		}
		document.getElementById("user_info").innerHTML = user_content;
}