text: document.getElementById("id_logic_version").innerHTML = "2019.11.22.2";
  var video = document.getElementById("id_video");
  
  var c = {audio: true, video: {facingMode: "user"}}
  
  navigator.mediaDevices.getUserMedia(c).then(on_ok_cam_uab).catch(on_fail_cam_uab);
  
  function on_ok_cam_uab(e)
  {
    video.srcObject = e;
   }
  
  function on_fail_cam_uab(e)
  {
     alert("Esec "+ e);
  }
  