问jQuery:如何捕获Textbox中的Tab键

EN

$('body').on('keydown', '#textbox', function(e) {
    if (e.which == 9) {
        e.preventDefault();
        // do your code
    }
});

$('#textbox').live('keypress', function(e) {
    if (e.keyCode === 9) {
        e.preventDefault();
        // do work
    }
});

$(this).children('input[type=text]').blur(timeEntered).keydown(function (e) {
        var code = e.keyCode || e.which;
        if (code == "9") {
            window.tabPressed = true;
            // Here is the external function you want to call, let your external
            // function handle all your custom code, then return false to
            // prevent the tab button from doing whatever it would naturally do.
            focusShift($(this));
            return false;
        } else {
            window.tabPressed = false;
        }
        // This is the code i want to execute, it might be different than yours
        function focusShift(trigger) {
            var focalPoint = false;
            if (tabPressed == true) {
                console.log($(trigger).parents("td").next("td"));
                focalPoint = $(trigger).parents("td").next("td");

            }
            if (focalPoint) {
                $(focalPoint).trigger("click");
            }
        }
    });