public function getHeaderCellContent()
	{
		if($this->grid->enableSorting && $this->sortable && $this->name!==null)
			return $this->grid->dataProvider->getSort()->link($this->name,$this->header,array('class'=>'sort-link'));
		elseif($this->name!==null && $this->header===null)
		{
			if($this->grid->dataProvider instanceof CActiveDataProvider)
				return CHtml::encode($this->grid->dataProvider->model->getAttributeLabel($this->name));
			else
				return CHtml::encode($this->name);
		}
		else
			return parent::getHeaderCellContent();
	}