notes = argv[1];
      if (argv[0] === "REGISTERED" && argc === 3)
        $("#slidecount").innerHTML = argv[2];
    }
  }
  
  /* Get url from hash or prompt and store it */
  
  Dz.getUrl = function() {
    var u = window.location.hash.split("#")[1];
    if (!u) {
      u = window.prompt("What is the URL of the slides?");
      if (u) {
        window.location.hash = u.split("#")[0];
        return u;
      }
      u = "<style>body{background-color:white;color:black}</style>";
      u += "<strong>ERROR:</