public function renderKeys()
	{
		echo CHtml::openTag('div',array(
			'class'=>'keys',
			'style'=>'display:none',
			'title'=>Yii::app()->getRequest()->getUrl(),
		));
		foreach($this->dataProvider->getKeys() as $key)
			echo "<span>".CHtml::encode($key)."</span>";
		echo "</div>\n";
	}