title: Jquery set variable input field value
body: <p>My HTML:</p>
  
  <pre><code>&lt;input id="penge" /&gt;
  &lt;input type="button" onclick="javascript: paymentwindow.open()" value="BETAL" id="betal" /&gt;
  </code></pre>
  
  <p>My jQuery:</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
  $(document).ready(function(){
  var penge = $("#penge").val();
  
  
              paymentwindow = new PaymentWindow({
                           'amount': penge,
                           'currency': "DKK",
                           'language': "1",
                           'orderid': "155",
                           'callbackurl': "http://localhost:3000/"
              });
  });
  &lt;/script&gt;
  </code></pre>
  
  <p>The variable is undefined. I want to set the variable penge when the betal button is clicked.</p>
  
  <p>UPDATE:</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
  $(document).ready(function(){
  var penge;
  $('#betal').click(function(){
      penge = $("#penge").val();
      paymentwindow.open();
  });
  
  
  
  
              paymentwindow = new PaymentWindow({
                           'amount': penge,
                           'currency': "DKK",
                           'language': "1",
                           'orderid': "155",
                           'callbackurl': "http://localhost:3000/"
              });
  });
  &lt;/script&gt;
  </code></pre>
  
  <p>Penge is undefined. I have also removed the onclick js for the betal button.</p>