Multiple picture upload

Hej

Jeg har fundet nedenstående script på nettet og rettet det lidt til, men kan ikke få det til at virke....
Er der nogen der kan hjælpe med at rette det til så det kommer til at virke?

<?PHP
if ($antal == ""){
    echo "Hvor mange billeder vil du uploade? <br>";
    echo '<form action="'.$PHP_SELF.'" enctype="multipart/form-data" method="post">';
        echo '<input type="Text" name="antal" value=""></input>';
        echo '<input type="Submit" name="ok" value="OK"></input>';
    echo '</form>';
}else{


    echo "Hvor mange billeder vil du uploade? <br>";
    echo '<form action="'.$PHP_SELF.'" enctype="multipart/form-data" method="post">';
        echo '<input type="Text" name="antal" value=""></input>';
        echo '<input type="Submit" name="ok" value="OK"></input>';
    echo '</form>';
   
$Admin[UploadNum] = "$antal";
$Admin[Directory] = "test/billeder/"; 
if($FileUpload) {
for ($Number = 1; $Number <= $Admin[UploadNum]; $Number++){
$PictureFirst = "fileup$Number"."_name";
$OriginalFileName = $$PictureFirst;
$SetFormatTempFile = "fileup$Number";
$TemporaryFile = $$SetFormatTempFile;
    if($TemporaryFile != "none") {
    $Filesizebtyes = filesize($TemporaryFile);
    $ok = 1;
        if($Filesizebtyes < 10) {
        $error .= "Error uploading (file size lower than 10 bytes) for file $Number<BR>";
        $ok = 2;
        }
    if(file_exists("$Admin[Directory]/$OriginalFileName") OR $ok == 2) {
    $error .="File name already exists for file $Number<BR>";
    } else {
    copy ($TemporaryFile, "$Admin[Directory]/$OriginalFileName");
    $error .="File $Number has been uploaded<BR>";
    }
        }
}
if(!$error) {
$error .= "No files have been selected for upload";
}
echo $error;
exit();
} else {
echo '<form enctype="multipart/form-data" action="'.$PHP_SELF.'" method="post">';
for ($Number = 1; $Number <= $Admin[UploadNum]; $Number++){
echo "<input name=\"fileup$Number\" type=\"file\" size=\"25\">\n";   
}
echo "<br><input name=\"FileUpload\" type=\"submit\" value=\"Upload Files\">\n";
exit();
}

}
?>