我如何使用jQuery获取此元素的索引？

问题描述

这是我的XHTML

我试图获得使用jQuery发送到PHP脚本的元素的索引。 p>

 < form action =/ accreditation / questions /method =postid =questions-form> 
< fieldset id =question-0> 
<图例>问题< / legend> 
< h3>草是什么颜色？< / h3> 
< ul> 
< li> 
< input type =radioname =answer [0]value =0id =radio-0-0/> 
< label for =radio-0-0>绿色< / label> 
< / li> 
< li> 
< input type =radioname =answer [0]value =1id =radio-0-1/> 
< label for =radio-0-1>红色< / label> 
< / li> 
< li> 
< input type =radioname =answer [0]value =2id =radio-0-2/> 
< label for =radio-0-2> Orange< / label> 
< / li> 
< / ul> 
< / fieldset> 
< fieldset id =问题-1> 
<图例>问题< / legend> 
< h3> alex多少岁< / h3> 
< ul> 
< li> 
< input type =radioname =answer [1]value =0id =radio-1-0/> 
< label for =radio-1-0> 21< / label> 
< / li> 
< li> 
< input type =radioname =answer [1]value =1id =radio-1-1/> 
< label for =radio-1-1> 11< / label> 
< / li> 
< li> 
< input type =radioname =answer [1]value =2id =radio-1-2/> 
< label for =radio-1-2> 23< / label> 
< / li> 
< / ul> 
< / fieldset> 
< / form> 
  

我需要获取fieldset元素的索引。我目前正在使用这个每个迭代器（我不想改变它，因为它里面有很多其他的函数）。

$ b

}）; 
  

我想让qIndex成为fieldset相对于表单的索引。例如，在这种情况下，我应该使它等于0和1（虽然会有6个值，因为它循环遍历列表元素）。

我玩过一段时间并且一直无法获得正确的索引。我一直没有找到（-1）。

如果有帮助，这里是我用来获取列表项索引相对于它包含ul元素的代码。

$ b

  index = $（'li'，$（this）.parent（））。index （这个）; 
  

我的fieldset索引抓取代码有什么问题？

LI 的父母是 UL ，而不是 fieldset 。

我认为这会为您设置 qIndex ：

  qIndex = $（'fieldset'）。index（$（this）.parents（'fieldset'））; 
  

I am trying to get the index of an element using jQuery to send to a PHP script.

Here is my XHTML

<form action="/accreditation/questions/" method="post" id="questions-form">
  <fieldset id="question-0">
    <legend>Question</legend>
    <h3>What colour is grass?</h3>
    <ul>
      <li>
        <input type="radio" name="answer[0]" value="0" id="radio-0-0" />
        <label for="radio-0-0">Green</label>
      </li>
      <li>
        <input type="radio" name="answer[0]" value="1" id="radio-0-1" />
        <label for="radio-0-1">Red</label>
      </li>
      <li>
        <input type="radio" name="answer[0]" value="2" id="radio-0-2" />
        <label for="radio-0-2">Orange</label>
      </li>
    </ul>
  </fieldset>
  <fieldset id="question-1">
    <legend>Question</legend>
    <h3>how old is alex</h3>
    <ul>
      <li>
        <input type="radio" name="answer[1]" value="0" id="radio-1-0" />
        <label for="radio-1-0">21</label>
      </li>
      <li>
        <input type="radio" name="answer[1]" value="1" id="radio-1-1" />
        <label for="radio-1-1">11</label>
      </li>
      <li>
        <input type="radio" name="answer[1]" value="2" id="radio-1-2" />
        <label for="radio-1-2">23</label>
      </li>
    </ul>
  </fieldset>
</form>

I need to get the index of the fieldset elements. I am currently using this each iterator (which I'd like not to change because it has a lot of other functions inside it).

$('#questions-form ul li').each(function() {
    qIndex = $('fieldset').index($('fieldset', $(this).parent()))
});

I'd like qIndex to be the index of fieldset relative to the form. For example, in this case I should have it equal to 0 and 1 (although there would be 6 values because it's looping through the list elements).

I have played around for a while and have been unable to get the correct index. I keep getting not found (-1).

If it helps, here is the code I'm using to get the list item's index relative to it's containing ul element.

index = $('li', $(this).parent()).index(this);

What is wrong with my fieldset index grabbing code?

解决方案

The LI's parent is UL, not the fieldset.
I think this will set qIndex for you:

qIndex = $('fieldset').index($(this).parents('fieldset'));

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