网页防止tab键的使用快速解决方法

<script language="javascript" type="text/javascript" src="../javascript/jquery-1.2.6.min.js"></script>
    <script language="javascript" type="text/javascript">
        $(document).ready(function () {
            $(document).bind('keydown', function (event) {
                if (event.keyCode == 9) {
                    document.body.focus();
                }
            });
        });
    </script>