title: jQuery checkbox validation
body: <p>I'm using the jQuery code below to validate a form. Now it all works great but I would like for the checkbox validation to use the <code>.validator</code> rather than its current <code>alert</code>, but when I add <code>required="required"</code> to the checkbox input boxes, I get messages for all of the checkboxes, whereas I only need one.</p>
  
  <pre><code>$("#request-form").validator({
      message: '&lt;div&gt;&lt;em/&gt;&lt;/div&gt;',
      position: 'top left',
      offset: [3, 40]
  });
  
  $("#see").overlay({mask: '#999', fixed: false}).bind("onBeforeClose", function(e) {
      $(".error").hide();
  });
  
  $('#request-form').submit(function(){
      if(!$('#request-form input[type="checkbox"]').is(':checked')){
          alert("Please check at least one.");
          return false;
      }
  });
  </code></pre>
  
  <p>Hope this makes sense. Thanks in advance. S</p>