var s=new Speedtest(); //create speedtest object

s.setParameter("test_order","IP_D"); //we only want download test
s.setParameter("time_auto",true); //fixed duration for tests
s.setParameter("time_dl_max",10); //10 seconds for the download test

s.onupdate=function(data){
  I("ip").textContent=data.clientIp;
  I("dlText").textContent=(data.testState==1&&data.dlStatus==0)?"...":data.dlStatus;
  I("pingText").textContent=data.pingStatus;
  I("jitText").textContent=data.jitterStatus;
  var prog=(Number(data.dlProgress)*2+Number(data.pingProgress))/3;
  I("progress").style.width=(100*prog)+"%";
}

s.onend=function(aborted){
  I("startStopBtn").className=""; //show start button again
  if(aborted){
    initUI();
  }
}

function startStop(){
  if(s.getState()==3){
    //speedtest is running, abort
    s.abort();
  }else{
    //test is not running, begin
    s.start();
    I("startStopBtn").className="running";
  }
}

function initUI(){
  I("dlText").textContent="";
  I("pingText").textContent="";
  I("jitText").textContent="";
  I("ip").textContent="";
}

function I(id){
  return document.getElementById(id);
}