1<!-- Find values of checked boxes with jquery -->
2<div class="fruit">
3  <label>
4    <span>Apple</span>
5    <input onchange="checkValues()" name="apple" type="checkbox" value="apple">
6  </label>
7
8  <label>
9    <span>Banana</span>
10    <input onchange="checkValues()" name="banana" type="checkbox" value="banana">
11  </label>
12
13  <label>
14    <span>Grape</span>
15    <input onchange="checkValues()" name="grape" type="checkbox" value="grape">
16  </label>
17</div>
18
19<script>
20  function checkValues() {
21    $('.fruit input:checkbox').each(function(index, element) {
22      if (element.checked === true) {
23        console.log(element.value)
24      }
25    });
26  }
27</script>

1function onSubmit() 
2{ 
3    var fields = $("input[name='list']").serializeArray(); 
4    if (fields.length === 0) 
5    { 
6        alert('nothing selected'); 
7        // cancel submit
8        return false;
9    } 
10    else 
11    { 
12        alert(fields.length + " items selected"); 
13    }
14}
15
16// register event on form, not submit button
17$('#subscribeForm').submit(onSubmit)
18
19//**************************************************
20// HTML
21<form method="POST" id="subscribeForm">
22    <fieldset id="cbgroup">
23        <div><input name="list" id="list0" type="checkbox"  value="newsletter0" >zero</div>
24        <div><input name="list" id="list1" type="checkbox"  value="newsletter1" >one</div>
25        <div><input name="list" id="list2" type="checkbox"  value="newsletter2" >two</div>
26    </fieldset>
27    <input name="submit" type="submit"  value="submit">
28</form>
29