public function ajaxaddAction()
	{
		$this->_helper->layout()->disableLayout();
		$this->_helper->viewRenderer->setNoRender(true);
		$description = $this->_getParam('description');
		$typeId = $this->_getParam('typeId');
		$modId = $this->_getParam('modId');
		$priority = $this->_getParam('priority');
		$userId = $this->getUserId();
		$iTime = date("Y-m-d,H:i");
		$status = 0;
		$improvements = new System_Models_ImprovementMapper();
		$improvement = new System_Models_Improvement();
		$improvement->setTypeId($typeId);
		$improvement->setModId($modId);
		$improvement->setPriority($priority);
		$improvement->setUserId($userId);
		$improvement->setDescription($description);
		$improvement->setITime($iTime);
		$improvement->setStatus($status);
		try
		{
			$improvements->save($improvement);
			echo "系统问题提交成功.";
			}
			catch(Exception $e)
			{
				echo "系统问题提交失败,请稍后再试.";
			}	
	}