有没有办法使用javascript填充带有值的html下拉菜单？

Question

我需要一个下拉菜单,允许您从中选择一年(1900-2011).我很确定java脚本具有相应的功能,但我完全不知道如何在代码中执行此操作.

我正在使用PHP.

这不是一回事吗？

while(i<2012){
add i to dropdown list
increment i
}

这是我对表单的当前代码:

<form action="cite.php" method="post">
<h1>Newspaper</h1>

<script>

var select = document.getElementById("year");
for(var i = 2011; i >= 1900; --i) {
    var option = document.createElement('option');
    option.text = option.value = i;
    select.add(option, 0);
}


</script>

<table width="100%">
  <tr>
    <td><h3>Author Name</h3></td>
    <td><table width="100%" border="0">
      <tr>
        <td><label>
          <input type="text" name="lastName" id="lastName" />
        </label></td>
      </tr>
      <tr>
        <td><label>
          <input type="text" name="firstName" id="firstName" />
        </label></td>
      </tr>
    </table></td>
  </tr>
  <tr>
    <td><h3>Title of Article</h3></td>
    <td><label>
      <input type="text" name="artTit" id="artTit" />
    </label></td>
  </tr>
  <tr>
    <td><h3>Title of Newspaper</h3></td>
    <td><label>
      <input type="text" name="newsTit" id="newsTit" />
    </label></td>
  </tr>
  <tr>
    <td><h3>City</h3></td>
    <td><label>
      <input type="text" name="city" id="city" />
    </label></td>
  </tr>
  <tr>
    <td><h3>Date Published</h3></td>
    <td><table width="100%" border="0">
      <tr>
        <td>&nbsp;</td>
      </tr>
      <tr>
        <td>&nbsp;</td>
      </tr>
      <tr>
        <td><select id="year" name="year"></select>
</td>
      </tr>
    </table></td>
  </tr>
  <tr>
    <td><h3>Edition</h3></td>
    <td><label>
      <input type="text" name="edi" id="edi" />
    </label></td>
  </tr>
  <tr>
    <td><h3>Page Designation</h3></td>
    <td><label>
      <input type="text" name="page" id="page" />
    </label></td>
  </tr>
  <tr>
    <td><h3>Medium</h3></td>
    <td><table width="200">
      <tr>
        <td><label>
          <input type="radio" name="RadioGroup1" value="print" id="RadioGroup1_0" />
          Print</label></td>
      </tr>
      <tr>
        <td><label>
          <input type="radio" name="RadioGroup1" value="web" id="RadioGroup1_1" />
          Web</label></td>
      </tr>
    </table>
    </td>
  </tr>
  <tr>
    <td>&nbsp;</td>
    <td><label>
      <input type="text" name="med" id="med" />
    </label></td>
  </tr>
  <tr>
    <td><input type="hidden" name="hiddenField" id="hiddenField" /></td>
    <td><label>
      <input type="submit" name="Submit" id="Submit" value="Submit" />
    </label></td>
  </tr>
</table>


</form>

Answer 1

假设你有这个元素:

 <select id="year" name="year"></select>

您可以使用此代码:

var select = document.getElementById("year");
for(var i = 2011; i >= 1900; --i) {
    var option = document.createElement('option');
    option.text = option.value = i;
    select.add(option, 0);
}

看到它在行动.

但是:你为什么需要这样做？难道不能直接从服务器端填充下拉菜单,这会更自然吗？

更新:来自PHP:

<td>
    <select id="year" name="year">
    <?php for($i = 2011; $i >= 1900; --$i) 
              printf('<option value="%d">%d</option>', $i, $i);
    ?>
    </select> 
</td>