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function send_file_to_browser($filename_save, $mimetype, $dl_link, $dl_dir)
	{
	global $HTTP_USER_AGENT, $HTTP_SERVER_VARS;

	$filename = ($dl_dir == '') ? $dl_link : $dl_dir . $dl_link;
	$file_check = @fopen($filename, 'rb');

	if ($file_check)
		{ fclose($file_check); $check_ok = TRUE; }
	else
		{ $check_ok = FALSE; }

	//
	// Determine the Browser the User is using, because of some nasty incompatibilities.
	// Most of the methods used in this function are from phpMyAdmin. :)
	//
	if (!empty($_SERVER['HTTP_USER_AGENT'])) 
		{ $HTTP_USER_AGENT = $_SERVER['HTTP_USER_AGENT'];} 
	else if (!empty($HTTP_SERVER_VARS['HTTP_USER_AGENT'])) 
		{ $HTTP_USER_AGENT = $HTTP_SERVER_VARS['HTTP_USER_AGENT']; }
	else if (!isset($HTTP_USER_AGENT))
		{ $HTTP_USER_AGENT = '';}

	if (ereg('Opera(/| )([0-9].[0-9]{1,2})', $HTTP_USER_AGENT, $log_version)) 
		{ $browser_version = $log_version[2]; $browser_agent = 'opera';} 

	else if (ereg('MSIE ([0-9].[0-9]{1,2})', $HTTP_USER_AGENT, $log_version)) 
		{ $browser_version = $log_version[1]; $browser_agent = 'ie'; } 

	else if (ereg('OmniWeb/([0-9].[0-9]{1,2})', $HTTP_USER_AGENT, $log_version)) 
		{ $browser_version = $log_version[1]; $browser_agent = 'omniweb'; } 

	else if (ereg('Netscape([0-9]{1})', $HTTP_USER_AGENT, $log_version)) 
		{ $browser_version = $log_version[1]; $browser_agent = 'netscape'; } 

	else if (ereg('Mozilla/([0-9].[0-9]{1,2})', $HTTP_USER_AGENT, $log_version)) 
		{ $browser_version = $log_version[1]; $browser_agent = 'mozilla'; } 

	else if (ereg('Konqueror/([0-9].[0-9]{1,2})', $HTTP_USER_AGENT, $log_version)) 
		{ $browser_version = $log_version[1]; $browser_agent = 'konqueror'; } 
	else 
		{ $browser_version = 0; $browser_agent = 'other'; }

	/*
	// Correct the mime type - we force application/octetstream for all files, except images
	// Please do not change this, it is a security precaution
	if (!strstr($mimetype, 'image'))
		{ $mimetype = ($browser_agent == 'ie' || $browser_agent == 'opera') ? 'application/octetstream' : 'application/octet-stream'; }
	*/

	//
	// Correct the Mime Type, if it's an octetstream
	//
	if ( ($mimetype == 'application/octet-stream') || ($mimetype == 'application/octetstream') )
		{
		if ( ($browser_agent == 'ie') || ($browser_agent == 'opera') )
			{ $mimetype = 'application/octetstream'; }
		else
			{ $mimetype = 'application/octet-stream'; }
		}

	//
	// Now send the File Contents to the Browser
	//

	if ($check_ok)
		{ 
		//
		// Send out the Headers
		//

		@ob_end_clean();
		@ini_set('zlib.output_compression', 'Off');
		header('Pragma: public');
		header('Content-Transfer-Encoding: none');

		// Send out the Headers
		header('Content-Type: ' . $mimetype . '; name="' . $filename_save . '"');
		header('Content-Disposition: inline; filename="' . $filename_save . '"');

		$size = @filesize($filename);
		if ($size)
			{
			header("Content-length: $size");
			}

		@readfile($filename); 
		}
	else
		{
		// Fehlerausgabe
		}
	exit();
	}