file download

[leetcrew]

<?php

define ('IN_FSERVE', true);
$root_path = "./";
$phpEx = substr(strrchr(__FILE__, '.'), 1);
include($root_path . 'include_all.'.$phpEx);

if (  !$HTTP_USER_DATA['logged']  )
	$granted = 0;

$sql = "SELECT * FROM `" . $prefix . "binary` WHERE `id`='" . $id  . "'";

$row_file = $db->buffered_db_query($sql);

if ( $row_file[owner] == $HTTP_USER_DATA[userid] )
	$granted = 1;

if (!$granted)
	deny();

$new_count = $row_file[downloaded] + 1;
$sql = "UPDATE `" . $prefix . "binary` SET `downloaded`='"  .  $new_count  . "' WHERE `id`='" .  $id . "'";
$retid = $db->db_query($sql);

header ("Content-type: " . $row_file[content-type]);
header("Content-disposition: filename=" . $row_file[filename]);
header('Pragma: public');
printf ("%s", $row_file[binary] );


?>

kinda hard to explain...

this script is working but what i want is if the content-type of file is an image or a text file then, it should be automatically visible on the browser without prompting the visitor to download the file.

please help... thanks in advance