title: paypal recurring payments form
body: <p>I have a website with a payment form,
  I want to add recurring payments. 
  how would i do that? what <code>ID</code>'s do I need to use in the form fields?</p>
  
  <p>I saw a <code>WordPress</code> <code>plugin</code> that uses <code>a3</code> <code>t3</code> and <code>p3</code> like so:</p>
  
  <pre><code>    &lt;input type="hidden" name="a3" id="a3" value="" /&gt;
  &lt;p class="donate_recur"&gt;&lt;label for="recur"&gt;Repeat Donation&lt;/label&gt;
  &lt;select name="t3" id="t3"&gt;
                  &lt;option value="0"&gt; Do not repeat &lt;/option&gt; 
                   &lt;option value="D"&gt; Daily &lt;/option&gt; 
                   &lt;option value="W"&gt; Weekly &lt;/option&gt; 
                   &lt;option value="M"&gt; Monthly &lt;/option&gt; 
                   &lt;option value="Y"&gt; Yearly &lt;/option&gt; 
   &lt;/select&gt; x 
  &lt;input name="p3" id="p3" value="'.$dplus['duration'].'" type="text" style="width:10px;" /&gt;
  </code></pre>
  
  <p>I'm not sure what <code>a3</code> is but <code>t3</code> is ever how long the transaction will happen, and <code>p3</code> is how many times it will happen.</p>
  
  <p>I looked a little on the web and i found how to make a <code>PayPal</code> button for some kind of  product with recurring payments. but I need it to be dynamically inputted.</p>
  
  <p>thank you.</p>