$('#phone').keydown(function (e) {
        if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1 ||
                // Allow: Ctrl+A
            (e.keyCode == 65 && e.ctrlKey === true) ||
                // Allow: Ctrl+C
            (e.keyCode == 67 && e.ctrlKey === true) ||
                // Allow: Ctrl+X
            (e.keyCode == 88 && e.ctrlKey === true) ||
                // Allow: home, end, left, right
            (e.keyCode >= 35 && e.keyCode <= 39)) {
            // let it happen, don't do anything
            return;
        }
        // Ensure that it is a number and stop the keypress
        if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
            e.preventDefault();
        }

        var foo = $(this).val().split("-").join(""); // remove hyphens
        foo = foo.match(new RegExp('.{1,4}$|.{1,3}', 'g')).join("-");
        $(this).val(foo);
    });