Detecting a click in a checkbox with jQuery
A simple script to detect when a checkbox is clicked. What you do with once you’ve detected the click is up to you.
 <html>
 <head>
 <script src="http://www.google.com/jsapi"></script>
 <script>
 google.load("jquery", "1.3.2");
 google.setOnLoadCallback(function() {
  $('#agree').click( function() {
    if($(this).attr('checked')){
      alert('checked');
    }
    else{
      alert('unchecked');
    }
  });
 });
 </script>
 </head>
 <body>
 <p>
 <input id="agree" type="checkbox" /> I agree
 </p>
 </body></html>
