<script src="http://code.jquery.com/jquery-latest.min.js"></script>
        <script>window.jQuery || document.write('<script src="js/jquery-latest.min.js">\x3C/script>')</script>
        <script type="text/javascript" src="js/bootstrap.js"></script>
        <script type="text/javascript">
            function validateCheckBox()
            {
                var c = document.getElementsByTagName('input');
                for (var i = 0; i < c.length; i++)
                {
                    if (c[i].type == 'checkbox')
                    {
                        if (c[i].checked)
                        {
                            return true;
                        }
                    }
                }
                alert('Please select at least 1 ticket.');
                return false;
            }
        </script>