Untitled

<html>
  <head>
    <script type="text/javascript" src="jquery-1.2.6.js"></script>
    <script type="text/javascript">
      function selection(obj) {
        var property = obj.options[obj.selectedIndex].value;
        if (properties[property]) {
          var form = document.forms[0], boxes = form.elements['edit[stories][]'];
          for (i = 0; i < boxes.length; i++) boxes[i].checked = false;
          for (i = 0; i < boxes.length; i++) {
            for (j = 0; j < properties[property].length; j++) {
              if (boxes[i].value == properties[property][j]) {
                boxes[i].checked = true;
              }
            }
          }
        }
      }
    </script>
    <script type="text/javascript">
      var properties = new Array();
      properties['omelet'] = [1, 2, 3];
      properties['fruit'] = [4, 5];
      properties['veggies'] = [6];
      properties['offers'] = [3, 5];
    </script>
  </head>
  <body>
    <form>
      <select onchange="selection(this)">
        <option value="ignore">check...
        <option value="omelet">omelet
        <option value="fruit">fruit
        <option value="veggies">veggies
        <option value="offers">offers
        <option value="all">all
        <option value="nothing">nothing
      </select>

      <input type="checkbox" name="edit[stories][]" value="1">Butter
      <input type="checkbox" name="edit[stories][]" value="2">Cheese
      <input type="checkbox" name="edit[stories][]" value="3">Eggs
      <input type="checkbox" name="edit[stories][]" value="4">Apples
      <input type="checkbox" name="edit[stories][]" value="5">Pears
      <input type="checkbox" name="edit[stories][]" value="6">Broccoli
    </form>
  </body>
</html>