sS hMakeComputerID() {
  ret hjavascript([[
  function makeComputerID() {
    var text = "";
    var possible = "abcdefghijklmnopqrstuvwxyz";

    for (var i = 0; i < 12; i++)
      text += possible.charAt(Math.floor(Math.random() * possible.length));
    return text;
  }
  
  var computerID = localStorage.getItem('computer-id');
  if (computerID == null || computerID.length != 12) {
    computerID = makeComputerID();
    localStorage.setItem('computer-id', computerID);
  }
  ]]);
}