CMailTools::ImageTypeToMimeType

static function ImageTypeToMimeType($type)
{
	static $aTypes = array(
		1 => "image/gif",
		2 => "image/jpeg",
		3 => "image/png",
		4 => "application/x-shockwave-flash",
		5 => "image/psd",
		6 => "image/bmp",
		7 => "image/tiff",
		8 => "image/tiff",
		9 => "application/octet-stream",
		10 => "image/jp2",
		11 => "application/octet-stream",
		12 => "application/octet-stream",
		13 => "application/x-shockwave-flash",
		14 => "image/iff",
		15 => "image/vnd.wap.wbmp",
		16 => "image/xbm",
	);
	if (isset($aTypes[$type]))
		return $aTypes[$type];
	else
		return "application/octet-stream";
}