<script type="text/javascript">
        jQuery(function () {
            jQuery('input:text:first').focus();
            var $inp = jQuery('input:text');
            $inp.bind('keydown', function (e) {
                var key = e.which;
                if (key == 13) {
                    e.preventDefault();
                    var nxtIdx = $inp.index(this) + 1;
                    jQuery(":input:text:eq(" + nxtIdx + ")").focus();
                }
            });
        });    
    </script>