Jquery自动对焦在下一个字段上

Question

我怎样才能在2位数之后在下一个字段上进行自动对焦？

这是jquery，它不适合我 -

    $("#personalDetailMobilePhoneAreaInput").keyup(function () {
        if (this.value.length == this.maxLength) {
            $(this).next(':input').focus();
        }
    });

          @Html.TextBoxFor(m => m.CommunicationView.MobilePhone.Area, new { @id = "personalDetailMobilePhoneAreaInput",  @class="customText wdt80 numericValue",type = "text",maxlength="2" })
          @Html.ValidationMessageFor(m => m.CommunicationView.MobilePhone.Area)

          @Html.TextBoxFor(m => m.CommunicationView.MobilePhone.Number, new { @id = "personalDetailMobilePhoneNumberInput",  @class="customText wdt120 mrglft10 phnIE numericValue",type = "text",maxlength="8" })
          @Html.ValidationMessageFor(m => m.CommunicationView.MobilePhone.Number)

Answer 1

试试这个：

$('#personalDetailMobilePhoneAreaInput').keyup(function(){

    var maxLength = $(this).attr('maxlength');
    var currLength = $(this).val().length;        

    if(currLength >= maxLength) 
        $(this).siblings('input').focus();
});

亲自尝试：http://jsfiddle.net/4kjh44Lm/