addLoadListener(init);

function init()
{
  
  
  var optional = document.getElementById("optional");
  optional.className = "hidden";
  
  var optional2 = document.getElementById("optional2");
  optional2.className = "hidden";
  
  var optional3 = document.getElementById("optional3");
  optional3.className = "hidden";

  var readYes = document.getElementById("readYes");
  readYes.onclick = showOptional;
    
  
  var readNo = document.getElementById("readNo");
  readNo.onclick = showOptional2;
  
  var readNo2 = document.getElementById("readNo2");
  readNo2.onclick = showOptional3;
  


 

  return true;
}






function showOptional()
{
  var optional = document.getElementById("optional");
  optional.className = "";
  optional2.className = "hidden";
  optional3.className = "hidden";

  return true;
}

function hideOptional()
{
  var optional = document.getElementById("optional");
  optional.className = "hidden";

  return true;
}




function showOptional2()
{
  var optional2 = document.getElementById("optional2");
  optional2.className = "";
  optional.className = "hidden";
  optional3.className = "hidden";
  


  return true;
}

function hideOptional2()
{
  var optional2 = document.getElementById("optional2");
  optional2.className = "hidden";

  return true;
}





function showOptional3()
{
  var optional3 = document.getElementById("optional3");
  optional3.className = "";
  optional.className = "hidden";
  optional2.className = "hidden";


  return true;
}

function hideOptional3()
{
  var optional3 = document.getElementById("optional3");
  optional3.className = "hidden";

  return true;
}





function addLoadListener(fn)
{
  if (typeof window.addEventListener != 'undefined')
  {
    window.addEventListener('load', fn, false);
  }
  else if (typeof document.addEventListener != 'undefined')
  {
    document.addEventListener('load', fn, false);
  }
  else if (typeof window.attachEvent != 'undefined')
  {
    window.attachEvent('onload', fn);
  }
  else
  {
    var oldfn = window.onload;
    if (typeof window.onload != 'function')
    {
      window.onload = fn;
    }
    else
    {
      window.onload = function()
      {
        oldfn();
        fn();
      };
    }
  }
}