您填写的信息有以下问题：
"; $UserId=strtolower($UserId); if (!eregi('^[0-9_a-z]{4,20}$', $UserId)) { $err_msg.="会员登录名格式不正确
"; $err = 1; } else if (!eregi('^[0-9_a-z]{4,20}$', $Passwd)) { $err_msg.="密码格式不正确
"; $err = 1; } else { $query="select * from $TableMember where userid='$UserId'"; // echo "

$query

"; $result=@mysql_query($query); $row=@mysql_fetch_object($result); if (!$row || $Passwd!=$row->password) { $err_msg.="密码或用户名不正确
"; $err=1; } } if ($err) { session_unregister("SessionOnline"); session_destroy(); // 结束 Session VEGNET_html_head($page_title); echo '

'; $err_msg.="

"; echo $err_msg; include("login_html.php3"); break; } $LoginTime=time(); $OldTime=$LoginTime; $LoginIp=$REMOTE_ADDR; $query="delete from $TableMemberOnline where userid='$UserId'"; // echo "

$query

"; @mysql_query($query); session_start(); // 开始session $Uid=session_id(); // $Uid=md5(uniqid($LoginTime)); if(!session_is_registered("SessionOnline")) { // 如果不存在则新建 session_register("SessionOnline"); } $SessionOnline=$UserId; // echo "

UID: $Uid

"; //echo "

SessionOnline: $SessionOnline

"; $que="update $TableMember set login_num=(login_num+1) where userid='$UserId'"; $result=mysql_query($que) or die(mysql_error()); $query="insert into $TableMemberOnline (uid,userid,old_time,login_time,login_ip) values ('$Uid','$UserId','$OldTime','$LoginTime','$LoginIp')"; $sqlstr="insert into member_loginlog (uid,login_ip,login_time) values ('$SessionOnline','$LoginIp',now())"; mysql_query($sqlstr); @mysql_query($query); // echo "

$query

"; if (mysql_error()) { VEGNET_html_head($page_title); echo '

'; echo("

数据库不能更新数据，请联系 webmaster@vegnet.com.cn 。

"); } else { header("Location: sucess.php3?Msg=登录成功"); exit; } break; default: VEGNET_html_head($page_title); echo '

'; include("login_html.php3"); break; } include("$HomeDir/commphp/simplyfooter.php3"); ?>