jQuery-如何基于下拉列表中的值显示文本框

加载页面时，我希望隐藏

输入文本框

，id为：amf-input-othertitle19

但是，如果用户从下拉列表中为上面的文本框选择某个值（“其他”），以便他们可以在该框中填写信息

下面是代码下拉列表：

<select name="title_3" id="amf-input-title_3">
  <option value="Title" id="title_3-0">Title</option>
  <option value="Mr" id="title_3-1">Mr</option>
  <option value="Mrs" id="title_3-2">Mrs</option>
  <option value="Miss" id="title_3-3">Miss</option>
  <option value="Ms" id="title_3-4">Ms</option>
  <option value="Dr" id="title_3-5">Dr</option>
  <option value="Professor" id="title_3-6">Professor</option>
  <option value="Other" id="title_3-7">Other</option>

标题
先生
夫人
错过
太太
博士
教授
其他

要隐藏/显示的文本框：

<input type="text" class="text" 
  name="othertitle_19" id="amf-input-othertitle_19" 
  value="" placeholder="Please specify other...." 
  maxlength="255" 
  onkeyup="if (this.length>255) this.value=this.value.substr(0, 255)"
  onblur="this.value=this.value.substr(0, 255)"
/>

---

您需要查看

选择的id，并在选择时显示它

$('document').ready(function() {
    $('#amf-input-title_3').change(function() {
        if($(this).val() == 'Other') {
            $('#amf-input-othertitle_19').fadeIn(); 
        }
        else{
           $('#amf-input-othertitle_19').fadeOut();
        }
    })
});

JavaScript:

// Shorthand for $(document).ready(function () { ... });
$(function () {

    // It's more efficient to save off the jQuery object
    // than to re-traverse the DOM each time.
    var $input = $('#amf-input-othertitle_19');

    // Catch the change on <select /> change
    $('#amf-input-title_3').on('change', function () {

        // Quick little ternary operator...
        (this.value === "other") ? $input.show() : $input.hide();
    });
});

// Make sure to hide the input on initial load...
#amf-input-othertitle_19 {
    display: none;
}


// Shorthand for $(document).ready(function () { ... });
$(function () {

    // It's more efficient to save off the jQuery object
    // than to re-traverse the DOM each time.
    var $input = $('#amf-input-othertitle_19');

    // Catch the change on <select /> change
    $('#amf-input-title_3').on('change', function () {

        // Quick little ternary operator...
        (this.value === "other") ? $input.show() : $input.hide();
    });
});

// Make sure to hide the input on initial load...
#amf-input-othertitle_19 {
    display: none;
}