<script type="text/javascript" charset="utf-8">
// A function to handle "secondary" checkboxes
function secondaryCheckboxes(qID, primaryPosition, secondaryCount) {
  // Identify the elements
  var thisQuestion = $('#question'+qID);
  $('div.question-item', thisQuestion).parent().addClass('answer-row');
  var primaryRow = $('div.question-item:eq('+(primaryPosition-1)+')', thisQuestion).closest('.answer-row');
  var primaryInput = $('input.checkbox', primaryRow);
  var secondaryRows = primaryRow.nextAll('div.answer-row:lt('+(secondaryCount)+')');
  var secondaryInputs = $('input.checkbox', secondaryRows);
 
  // Indent the secondaries
  secondaryRows.css({ 'margin-left':'2.5em' });
 
  // Initial states of the secondary answers
  if (primaryInput.prop('checked') == false ) {
    secondaryRows.hide(); 
  } 
 
  // A listener on the primary answer to show or hide secondary answers 
  primaryInput.click(function (event) { 
 
    // Hide/show the secondary answers accordingly
    if (!$(this).is(':checked')) {
      secondaryRows.hide();        
      secondaryInputs.prop('checked', false);
      secondaryInputs.each(function(i) {
        checkconditions(this.value, this.name, this.type);
      });
    }
    else {
      secondaryRows.show(); 
    }
  });
}
 
  $(document).ready(function() {
    // Sub-question 1 is primary followed by 2 secondaries
    secondaryCheckboxes({QID}, 1, 2);   //Hier steht also, dass nach Teilfrage 1 zwei Unterkategorien kommen
    // Sub-question 6 is primary followed by 3 secondaries    
    secondaryCheckboxes({QID}, 6, 3);   //Hier steht also, dass nach Teilfrage 6 drei Unterkategorien kommen
    });  
</script>