text: //src
  var serverIp = 'http://127.0.0.1:3000/';
  
  //react
  if($("div#root").length == 0){
      iScript = document.createElement("script");
      iScript.type = "text/javascript";
      iScript.src = serverIp + '/static/js/bundle.js';
      document.getElementsByTagName("head")[0].appendChild(iScript); 
      var btn = document.createElement("div");
      btn.setAttribute("id","root");
      btn.setAttribute("style","position: relative;top: -45px;left: 380px;")
      var carmangeContent = document.getElementById("carmangeContent");
      carmangeContent.appendChild(btn);
  }else{
      console.log("VIS button exists!");
  }
  
  // var strVar="";
  // strVar += "<img src=\"http://127.0.0.1:3000/img/loading.gif\" width=\"26\">";
  // var loading = document.createElement("div");
  // loading.setAttribute("id","my-loading");
  // loading.setAttribute("style","position: absolute;top: -45px;left: 380px;")
  // loading.innerHTML = strVar;
  // $("#carmangeContent")[0].appendChild(loading);