Show div on radio button checked

HTML

<div id="main">
  <label for="Materiaal">Materiaal</label>
   <input type="text" name="Materiaal" id="Materiaal">
  </div>
<div id="main">
  <label for="Kleur">Kleur</label>
   <input type="text" name="Kleur" id="Kleur">
  </div>
  <div id="main">
  <label for="Afwerking">Afgewerkt</label>
  <input type="radio" name="afwerking" id="afwerkingChecked" value="Ja" checked />
  <label for="afwerkingchecked" class="radio">Ja</label>
  <input type="radio" name="afwerking" id="afwerkingUnchecked" value="Neen" />
  <label for="afwerkingUnchecked" class="radio">Neen</label>
</div>

<div id="divJa">
    <label for="cutback">Type afwerking</label>
    <input type="text" name="" id="" maxlength="8" placeholder="stain glaze/opbak.." value="" />
</div>

<div id="divNee">
  <input type="radio" name="cutback" id="cutbackChecked" value="Ja" checked />
  <label for="anatomischChecked">Anatomisch</label>
    <input type="radio" name="cutback" id="cutbackUnchecked" value="Neen" />
    <label for="cutback">Cutback</label>
    <input type="text" name="cutback" id="cutback" disabled maxlength="8" placeholder="incisaal/gingiva.." value="" />
</div>

CSS

body {
    padding:1em;
    font-family:sans-serif;
}

div {
    background:#F3F3F3;
    padding:1em;
    margin: 1em;
}

input {
    padding:.5em;
}

label { display: inline-block; width: 150px; }

JavaScript

function switchVar() {
    if($("#afwerkingUnchecked").prop("checked"))
        $("#divJa").hide();
     else
        $("#divJa").show();
    if($("#afwerkingChecked").prop("checked"))
        $("#divNee").hide();
     else
        $("#divNee").show();
}

function switchVar2() {
    if($("#cutbackUnchecked").prop("checked"))
        $("#cutback").prop('disabled', false);
     else
        $("#cutback").prop('disabled', true);
}



$(document).ready(function() {
    switchVar();
    $("input[name=afwerking]").change(switchVar);
    $("input[name=cutback]").change(switchVar2);
});