function wtpFunction() {
  var x = document.getElementById("wtp_div");
  var y = document.getElementById("resolution_div");
    x.style.display = "none";
      y.style.display = "inline-block";
}

    function Resolve() {
  var x = document.getElementById("resolution_div");
  var y = document.getElementById("posterior_div");
    x.style.display = "none";
      y.style.display = "inline-block";
}

    function postFunction() {
  var x = document.getElementById("submit_posterior");
  var z = document.getElementById("qn_post");
  var y = document.getElementById("confidence_div");
  $('#answer').prop('readonly', true);
    x.style.display = "none";
    z.style.display = "none";
      y.style.display = "inline-block";
}

function displayRange() {
   var v = parseFloat(document.getElementById("answer").value);
   var c = parseFloat(document.getElementById("confidence").value);
   lower = (v - (20-c) *0.05).toFixed(2).toString();
   upper = (v + (20-c) *0.05).toFixed(2).toString();
    if (c==0) {
       document.getElementById("text_conf_intro").value = "I am";
       document.getElementById("text_conf_min").value = "very uncertain";
      document.getElementById("text_conf_max").value = "";
         document.getElementById("text_conf_outro").value = " about how much the optimal machine would offer.";
   }
   else if (c === 20) {
              document.getElementById("text_conf_intro").value = "I am certain that the optimal machine would offer ";
          document.getElementById("text_conf_min").value = "exactly $ " + v.toFixed(2).toString();
          document.getElementById("text_conf_max").value = "";
                   document.getElementById("text_conf_outro").value = "";

   }
   else {
                     document.getElementById("text_conf_intro").value = "I am certain that the machine would offer";
       document.getElementById("text_conf_min").value = "between $ " + lower + " and $ ";
       document.getElementById("text_conf_max").value = upper;
                          document.getElementById("text_conf_outro").value = " to the computer players.";
   }
}