如果使用jquery选择了下拉项，则显示表单字段 [英] Show Form Field if Drop Down Item is Selected Using jquery

问题描述

我正在尝试创建一个下拉字段，如果选择了其他"项目，则会出现一个请指定"文本框.下面仅适用于一个下拉选择字段，但是一旦我添加了第二个选择字段，它便不再起作用.

I'm trying to create a dropdown field where if the "Other" item is selected, then a "Please Specify" text box appears. The below works with just one dropdown select field, but as soon as I add the second select field, it no longer works.

这是我似乎不起作用的东西:

Here's what I have that doesn't seem to work:

CSS ...

#techother{display:none;}
#lmsother{display:none;}

身体...

<p>Chose Your Browser: <select name = "Browser" required>
        <option value = "">-- Select an Option --</option>
        <option value = "1">IE</option>
        <option value = "2">FF</option>
        <option value = "3">Safari</option>
        <option value = "4">Opera</option>
        <option value = "5">Other</option>
        </select>
    </p>
  <div id="browserother">
    <p>Please Specify: <label id="browserlabel"><input name="Other Browser" type="text" placeholder="Other Browser" size="50" /></label></p>
    </div>

    <p>Operating System: <select name = "OS" required>
        <option value = "">-- Select an Option --</option>
        <option value = "Win">Windows</option>
        <option value = "ios">iOS</option>
        <option value = "otheros">Other</option>
        </select>
    </p>
  <div id="osother">
    <p>Please Specify: <label id="oslabel"><input name="Other OS" type="text" placeholder="Other OS" size="50" /></label></p>
  </div>

脚本...

  <script>
$('form select[name=Browser]').change(function(){
  if ($('form select option:selected').val() == '5'){
    $('#browserother').show();
  }else{
    $('#browserother').hide();
  }
});

$('form select[name=OS]').change(function(){
  if ($('form select option:selected').val() == 'otheros'){
    $('#osother').show();
  }else{
    $('#osother').hide();
  }
});
</script>

任何使这项工作可行的方法吗?谢谢！

Any way to make this work? Thanks!

推荐答案

您去了: http://jsfiddle.net/ecZrE/

您混合了选择器中的某些内容.使用

You mixed up some things in the selectors. Use

$('p select[name=Browser]')

代替

$('form select[name=Browser]')

，因为没有表单元素.但是您的代码段还是不完整.

since there is no form element. But your snippet is incomplete anyway.

另一个错误的选择器是

$('form select option:selected') 

因为您忘记了指定选择元素.

because you forgot to specify the select element.

这篇关于如果使用jquery选择了下拉项，则显示表单字段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！