Changing a value to that of a checked radio button

I have these radio buttons on a page and a button to go to the next page. (Called 'Doorgaan'). In the next page, I have this h2 with id "CatNaam" of which I want the value [CATEGORIENAAM] to be changed into the value of the checked radio button. How do I do this?

    <div data-role="page" id="beoordelen" data-theme="a">

        <div data-role="header">
            <h1>Beoordelen</h1>
            <a class="ui-btn-left" data-theme="a" data-rel="back">Vorige</a>
        </div><!-- /header -->

        <div data-role="content" data-theme="a">    
            <h2>Kies categorie</h2>
            <form id="oordeelKeuze" method="get">
                   <p>      
                      <input type = "radio" name = "categorie-oordeel" id = "goedkoop-bier" value = "Goedkoop bier" checked = "checked" />
                      <label for = "goedkoop-bier">Goedkoop bier</label>
                   </p><p>                    
                      <input type = "radio" name = "categorie-oordeel" id = "muziek" value = "Muziek" />
                      <label for = "muziek">Muziek</label>
                    </p><p>      
                      <input type = "radio" name = "categorie-oordeel" id = "gezelligheid" value = "Gezelligheid" />
                      <label for = "gezelligheid">Gezelligheid</label>
                    </p>   
            </form>
            <p><a href="#beoordelen2" data-direction="reverse" data-role="button" data-theme="b">Doorgaan</a></p>   

        </div><!-- /content -->


    </div><!-- /beoordelen -->

    <!-- Start of fifth page: #beoordelen2 -->
    <div data-role="page" id="beoordelen2" data-theme="a">

        <div data-role="header">
            <h1>Beoordelen</h1>
            <a class="ui-btn-left" data-theme="a" data-rel="back">Vorige</a>
        </div><!-- /header -->

        <div data-role="content" data-theme="a">    
            <h2>Geef cijfer voor</h2>
            <h2 id="CatNaam">[CATEGORIENAAM]</h2>
</div>
</div>

Using jQuery, give your button (Doorgaan) an id:

 <p><a href="#beoordelen2" data-direction="reverse" data-role="button" data-theme="b" id="buttonID">Doorgaan</a></p>   //buttonID in this case

and on your button (Doorgaan) on click add this:

$('#buttonID').click(function(){
   var selectedRadio= $("input[type='radio'][name='categorie-oordeel']:checked").val();
  $('#CatNaam').text(selectedRadio);
})

Here is the working example in a fiddle:

http://jsfiddle.net/F5brz/