public static function generateSubmitButton($label="Submit", 
                                                $offscreen=false)
    {
        $styleAttribute = '';
        
        if ($offscreen)
        {
            $styleAttribute = ' style="position: absolute; left: -9999px" ';
        }
        
        $html = '<input ' .
                    'type="submit" ' .
                    'value="' . $label . '" ' .
                     $styleAttribute . 
                '/>'; 
        
        return $html;
    }