Resize i true color

Jeg har denne kode, som skal resize billeder:

<?php 
/*
Will generate a pages width of
thumbnailed GIF's and JPG's
from a secified directory.  Will work
in a directory with other files in it
with no problems.  Part 2.  The image
creator.
Aspect ratio is not supported.

Generated: 24/3/03
Author: Rock
*/ 

// Comments will be throughout

$t_width = 190;  // Thumbnail width
$t_height = 145;  // Thumbnail height

// get and display jpeg images
if(stristr($QUERY_STRING,".jpg")){ 
    header("Content-type: image/jpeg"); 
    $srcimage = imagecreatefromjpeg($QUERY_STRING); 
    $destimage = imagecreate($t_width,$t_height); 
    $width = imageSX($srcimage); 
    $height = imageSY($srcimage); 
    imagecopyresized ($destimage,$srcimage,0,0,0,0,$t_width,$t_height,$width,$height); 
    ImageJPEG($destimage); 
    ImageDestroy($destimage); 
} 
/*
//Support for GIF unavailable at this time

elseif(stristr($QUERY_STRING,".gif")){
    header("Content-type: image/gif");
    $srcimage = imagecreatefromgif($QUERY_STRING);
    $destimage = imagecreate(100,100);
    $width = imageSX($srcimage);
    $height = imageSY($srcimage);
    imagecopyresized ($destimage,$srcimage,0,0,0,0,$t_width,$t_height,$width,$height);
    ImageGIF($destimage);
    ImageDestroy($destimage);     
}
*/ 

// on a problem geneterate an image with ERROR in it
else { 
$im = imagecreate(100,100); 
$blue = imagecolorallocate($im,0,0,200); 
$red = imagecolorallocate($im,255,0,0); 
imagestring($im,2,2,5,"ERROR",$red); 
imageGIF($im); 
imagedestroy($im); 
} 

?>




Problemet er at den ikke resizer i True Color, så billederne bliver underlige i farven!
Hvordan ændrer jeg dette?!