function login($username,$passwd){
global $admintable,$cookie_name,$dbname;

if ($username=="" || $passwd==""){
echo "用户名或密码不能为空";
echo "";
exit;
}
else{
$result=mysql_query("select * from $admintable where username='$username'") or die(mysql_error());
$array=mysql_fetch_array($result);
if (!$array[id]){
echo "用户名错误";
echo "";
exit;
}
elseif($passwd != $array[password]){
echo "密码错误";
echo "";
exit;
}
else{
setcookie ($cookie_name."_user",$username,time()+(1*24*3600));
setcookie ($cookie_name."_pass",$passwd,time()+(1*24*3600));

echo "";}
}
}
这是我写的登录代码，可是一输入用户名密码他能跳转到admin.php这个页面，但显示：“The directory name is invalid. ”不知道是怎么回事？？