public function getBaseUrl()
	{
		if($this->_baseUrl===null)
			$this->_baseUrl=rtrim(dirname($this->getScriptUrl()),'\\/');
		return $this->_baseUrl;
	}

	public function getScriptUrl()
	{
		if($this->_scriptUrl===null)
		{
			$scriptName=basename($_SERVER['SCRIPT_FILENAME']);
			if(basename($_SERVER['SCRIPT_NAME'])===$scriptName)
				$this->_scriptUrl=$_SERVER['SCRIPT_NAME'];
			elseif(basename($_SERVER['PHP_SELF'])===$scriptName)
				$this->_scriptUrl=$_SERVER['PHP_SELF'];
			elseif(isset($_SERVER['ORIG_SCRIPT_NAME']) && basename($_SERVER['ORIG_SCRIPT_NAME'])===$scriptName)
				$this->_scriptUrl=$_SERVER['ORIG_SCRIPT_NAME'];
			elseif(($pos=strpos($_SERVER['PHP_SELF'],'/'.$scriptName))!==false)
				$this->_scriptUrl=substr($_SERVER['SCRIPT_NAME'],0,$pos).'/'.$scriptName;
			elseif(isset($_SERVER['DOCUMENT_ROOT']) && strpos($_SERVER['SCRIPT_FILENAME'],$_SERVER['DOCUMENT_ROOT'])===0)
				$this->_scriptUrl=str_replace('\\','/',str_replace($_SERVER['DOCUMENT_ROOT'],'',$_SERVER['SCRIPT_FILENAME']));
			else
				throw new CException(Yii::t('yii','CHttpRequest is unable to determine the entry script URL.'));
		}
		return $this->_scriptUrl;
	}