public function SetOrder($property,$desc = false)
	{
		if (!$property)
		{
			// no property was specified.
			return;
		}
		
		$this->_order_delim = ($this->_set_order) ? "," : "";
		
		if($property == '?')
		{
			$this->_set_order = "RAND()" . $this->_order_delim . $this->_set_order;
		}
		else
		{
			$colname = $this->GetFieldFromProp($property);
			$this->_set_order .= $this->_order_delim . $colname . ($desc ? " desc" : "");	
		}

	}