function table_manager_fixfilesize($dsize)
{
    if (!is_numeric($dsize)) {
        $dsize = 0;
    } 
	
    if (strlen($dsize) <= 3) {
        $dsize = number_format($dsize / 1, 0);
        return "$dsize B";
    } elseif (strlen($dsize) <= 7) {
        $dsize = number_format($dsize / 1024, 1);
        return "$dsize KB";
    } elseif (strlen($dsize) <= 10) {
        $dsize = number_format($dsize / 1048576, 1);
        return "$dsize MB";
    } else {
        $dsize = number_format($dsize / 1073741824, 1);
        return "$dsize GB";
    } 
}