我想的是,如果某个选项,从下拉菜单中选择了文本框时,才可访问,我有如下的HTML表单:启用选项文本选自/禁用下拉菜单
<tr>
<td>a. Did any of your staff participate in training or orientation sessions related to any aspect of social performance management, during the reporting year? </td>
<td >
<p>
<select name="mfi_4_a_i">
<option>Yes</option>
<option>No</option>
<option>No, but planning in future</option>
</select>
</p>
<p>if not,and not planning please explain why not </p>
<input type="text" name="mfi_4_a_ii" id="sdd" />
</tr>
现在,当用户选择否选项,但在将来计划时,必须启用文本框,否则必须禁用文本框。
我该如何做到这一点?
重复[问题](http://stackoverflow.com/questions/5255969/how-to-make-a-checkbox-enable-and-禁用一个文本框在多个案例)由同一用户 – diEcho 2011-03-10 10:27:21