function ExecuteScript(strId)
{
  switch (strId)
  {
      case "5bglzI3HEzX":
        Script1();
        break;
      case "6VM6nwRXYbu":
        Script2();
        break;
  }
}

function Script1()
{
  window.parent.postMessage("lesson_completed", "*");
}

function Script2()
{
  window.parent.postMessage("lesson_completed", "*");
}