     cpuChart.setOption(cpuOption);
          } else if ("memory" == message.topic) {
          	if(xDatasMemory.length>100)
          		xDatasMemory.shift();
            xDatasMemory.push(getNow());
            if(yDatasMemory.length>100)
          		yDatasMemory.shift();
            yDatasMemory.push(Number.parseFloat(temp.substring(0, temp.length - 1)));
            memoryChart.setOption(memoryOption);
          }
        }
      }
    }

    function getRandomString() {
      return new Date().getTime()