Pre-fill a form (no control over form code)
<p>I'm using a form plugin / addon where I don't have control over how the form is generated.</p>

<p>The form generates HTML which looks like this:</p>

<pre><code>&lt;form&gt;
&lt;label&gt;First Name&lt;/label&gt;&lt;input name="Question25" type="text" value="" /&gt;
&lt;input class="formBlockSubmitButton" name="add" type="submit" value="Submit" /&gt;
&lt;/form&gt;
</code></pre>

<p>I would like to prefill some of the form values but I <strong>can't</strong> write, say</p>

<pre><code>&lt;input name="Question25" type="text" value="&lt;?php echo $my_value; ?&gt;" /&gt;
</code></pre>

<p>Because the form addon generates that HTML. I can write PHP or Javascript before this block, is there a way to search for an input with a name of "Question25" and then prefill it when the block comes up?</p>
