code: public Object func(String param) {
  		ReqInfo reqInfo = ContextUtils.getReqInfo();
  
  		StringBuffer sb = new StringBuffer();
  		// if (reqInfo.m_bUseAjax)
  		// sb.append("document.");
  		sb.append(param);
  		sb.append(reqInfo.getRequestId());
  		return sb.toString();
  	}
docs: 调用函数<br>
  不支持函数定义，函数定义必须使用TagLib
  
  @param param
  @return