magento-hackathon/Magento-Two-factor-Authentication

<?php
class MageHackDay_TwoFactorAuth_Block_Adminhtml_Select extends Mage_Adminhtml_Block_Html_Select {
    protected function _toHtml()
    {
        $this->setName($this->getInputName());
        $this->setClass('select');
        return trim(preg_replace('/\s+/', ' ',parent::_toHtml()));
    }

}