如何访问隐藏字段的值？

Question

我使用的是smarty模板，我的代码如下：

    <div class="breadcrumb-wrap">

{include file='resources-sub-menu.tpl'}

  <ul class="page-flow">
    <li><a href="#">Home</a><span>></span></li>
    <li>Questions</li>
  </ul>
</div>
<h1 class="c-heading"> Match Questions </h1>
<div class="c-grad-box fnShowData">
  <div class="form-wrapper">
    <form id="view-questions-form" name="questions_filter" action="{$control_url}modules/questions/match_question.php" method="post">
            <input type="hidden" name="page" id="page" value="1" >
      <div class="w50">              
        <ul>
          <li>
            <label>Subjects</label>
            <div class="form-element">
              <select name="subject_id" id="subject_id" onchange="get_topics_by_subject(this.value, 'get_topics_by_subject_for_filter', '#topic_id'); return false;">
                <option value="">All</option> 
                {foreach from=$all_subjects item=subjects key=key} 
                <option value="{$subjects.subject_id}" {if $subject_id == $subjects.subject_id} selected="selected"{/if}>{$subjects.subject_name}</option>
                {/foreach}
              </select>
            </div>
          </li>
        </ul>
      </div>
      <div class="w50">              
        <ul>
          <li>
            <label>Topics</label>
            <div class="form-element">
              <select name="topic_id" id="topic_id">
                    <option value="">All</option> 
                    {foreach from=$all_topics item=topics key=key} 
                    <option value="{$topics.topic_id}" {if $topic_id==$topics.topic_id} selected="selected"{/if}>{$topics.topic_name}</option>
                    {/foreach}
                  </select>
            </div>
          </li>
          <li>
            <div class="find-que-ans">
              <p class="custom-form"><label></label></p>
              <input type="submit" class="c-btn submit_form" name="btn_submit" id="btn_submit" value="Match Questions" />
            </div>
          </li>                           
        </ul>
      </div>        
    </form>
  </div>
</div>
<br/><br/>
<table width="100%" class="base-table tbl-practice" cellspacing="0" cellpadding="0" border="0">
  <tr class="evenRow">
    <th width="33%" style="text-align:center;" class="question-id">Que ID</th>
    <th width="33%" style="text-align:center;" class="question-id">Matching Que IDs</th>
    <th width="33%" style="text-align:center;" class="question-id">Percentage(%)</th>
  </tr>
{if $all_match_questions}
  {foreach from=$all_match_questions item=qstn key=key}   
    {if $qstn.similar_questions_ids_and_percentage}
  <tr class="oddRow">
    <td class="question-id" align="center" valign="top">
      <a href="{$qstn.return_url}" title="View question" class="inline_view_question_detail">QUE{$qstn.question_id}</a>{if $qstn.question_appeared_count gt 1}-Appeared({$qstn.question_appeared_count}){/if}
    </td>
    <td class="question" align="center" valign="top">
      {foreach from=$qstn.similar_questions_ids_and_percentage item=question key=q_no}
        {if $question.question_id!=''}
      <a href="{$qstn.return_url}" title="View question" class="inline_view_question_detail">QUE{$question.question_id}</a>{if $question.question_appeared_count gt 1}-Appeared({$question.question_appeared_count}){/if}
      {if $question.question_appeared_count eq 0}
        <a href="{$control_url}modules/questions/match_question.php?op=delete&question_id={$question.question_id}&subject_id=&topic_id=" title="Delete question" class="inline_view_question_detail"> Delete</a>
      {/if}
        {/if}<br />
      {/foreach}
    </td>
    <td class="question" align="center" valign="top">
      {foreach from=$qstn.similar_questions_ids_and_percentage item=question key=q_no}
        {if $question.percentage!=''}{$question.percentage}{/if}<br />
      {/foreach}               
    </td>
  </tr>
    {/if}
  {/foreach}
{else}
  <tr>
    <td colspan="2" align="center"><b>No Questions Available</b></td>
  </tr>
{/if}
</table>

您可以从上面的代码中观察到有两个隐藏字段，分别名为subject_id和topic_id。现在，在单击超链接时，我希望在查询字符串中发送这些隐藏的值。下面是我想要将subject_id和topic_id附加到当前查询字符串的超链接的当前代码。有人能在这方面给我指点吗？

<a href="{$control_url}modules/questions/match_question.php?op=delete&question_id={$question.question_id}&subject_id=&topic_id=" title="Delete question" class="inline_view_question_detail"> Delete</a>

这里还有一件事需要注意，我不想提交表单。我只想通过querystring发送值。

Answer 1

隐藏字段的工作方式与任何其他输入相同，值将来自输入框的名称。

<a href="{$control_url}modules/questions/match_question.php?op=delete&question_id={$question.question_id}&subject_id={$subjects.subject_id}&topic_id={$topics.topic_id}" title="Delete question" class="inline_view_question_detail"> Delete</a>

Answer 2

为什么要使用隐藏字段而不是选择值？在本例中，查找select值，因为这是主题id

  on click for anchor tag  
   var id=$("#subject_id").val();//find select value 
   var subjectid=$("#"+id).val();
  //Append in anchor tag href and similarly for topic id

Answer 3

看看你的代码，在我看来"subject_id“和"topic_id”都是字符串。

如果它们是字符串，这很简单，只需基本地附加它们即可。但是如果不是，并且它是一个变量，那么就像下面这样回显它们

<select id= "<? subject_id ?>">