public function renderSorter()
	{
		if($this->dataProvider->getItemCount()<=0 || !$this->enableSorting || empty($this->sortableAttributes))
			return;
		echo CHtml::openTag('div',array('class'=>$this->sorterCssClass))."\n";
		echo $this->sorterHeader===null ? Yii::t('zii','Sort by: ') : $this->sorterHeader;
		echo "<ul>\n";
		$sort=$this->dataProvider->getSort();
		foreach($this->sortableAttributes as $name=>$label)
		{
			echo "<li>";
			if(is_integer($name))
				echo $sort->link($label);
			else
				echo $sort->link($name,$label);
			echo "</li>\n";
		}
		echo "</ul>";
		echo $this->sorterFooter;
		echo CHtml::closeTag('div');
	}