if ($UserName==""

{
echo "必须输入您ftp登陆时的用户名";
echo '<FORM action="'.$_SERVER['PHP_SELF'].'">;<input type="submit" value="返回">;</FORM>;'."\n";
} else if ($OldPass==""

{
echo "必须输入原来的密码";
echo '<FORM action="'.$_SERVER['PHP_SELF'].'">;<input type="submit" value="返回">;</FORM>;'."\n";
} else if ($NewPass1=="" || $NewPass2==""

{
echo "新密码不能设置为没有哈";
echo '<FORM action="'.$_SERVER['PHP_SELF'].'">;<input type="submit" value="返回">;</FORM>;'."\n";
} else if ($NewPass1!=$NewPass2) {
echo "您两次输入的新密码不一样";
echo '<FORM action="'.$_SERVER['PHP_SELF'].'">;<input type="submit" value="返回">;</FORM>;'."\n";
} else { //修改密码吧
$conn_id = ftp_connect($Host,$Port,30) or die("连接服务器失败! $Host:Port"

;
if (@ftp_login($conn_id, $UserName, $OldPass)) {
echo "原密码验证OK....<br>;\n";
$Command="pswd $OldPass $NewPass1";
// echo $Command."|<br>;\n";
if ($res= ftp_site ($conn_id, $Command)) {
echo "<font color=green>;密码修改成功!</font>;<br />;\n";
}else { echo "<font color=red>;密码修改失败, 请系统管理员协助处理</font>;<br />;\n"; }