title: Is nested <form> possible?
body: <p>in a content page of an asp.net web page, i would like to include the "paypal" button "Pay Now". </p>
  
  <p>So, i've a master page, and a content page. 
  In my content page i copy-paste paypal code. 
  In particular i use a "modalpopupextender" to permit my user to buy the object. 
  The problem is... it not work. 
  So my hypotheses are:</p>
  
  <ol>
  <li>I'm not sure, but i think i can't use a nested <code>&lt;form action&gt;</code> </li>
  <li>If not the first, maybe i can't use a <code>&lt;form action&gt;</code> into a modal popup ? </li>
  </ol>
  
  <p>someone can suggest me an "elegant" solutions to solve this ? 
  Thank you ...</p>
  
  <p>EDIT: in particular, what i'm trying to do is to permit to sell from a website. 
  I've a master page, and a content page. 
  Obviously in master page i've the classical "form action" .
  Then i'm gone to paypal and got this code: "</p>
  
  <pre><code>&lt;form action="https://www.paypal.com/cgi-bin/webscr" method="post"&gt;
  &lt;input type="hidden" name="cmd" value="_s-xclick"&gt;
  &lt;table&gt;
  &lt;tr&gt;&lt;td&gt;
      &lt;input type="hidden" name="on0" value="Annuncio Premium"&gt;Annuncio Premium
  &lt;/td&gt;&lt;/tr&gt;
  &lt;tr&gt;&lt;td&gt;
      &lt;select name="os0"&gt;
          &lt;option value="Premium 1"&gt;Premium 1 €1,00&lt;/option&gt;
      &lt;/select&gt;
  &lt;/td&gt;&lt;/tr&gt;
  &lt;/table&gt;
  &lt;input type="hidden" name="currency_code" value="EUR"&gt;
  &lt;input type="hidden" name="encrypted" value="-----BEGIN "&gt;
  &lt;input type="image" src="https://www.paypal.com/it_IT/IT/i/btn/btn_paynowCC_LG.gif" border="0" name="submit" alt="PayPal - Il sistema di pagamento online più facile e sicuro!"&gt;
  &lt;img alt="" border="0" src="https://www.paypal.com/it_IT/i/scr/pixel.gif" width="1" height="1"&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>So i've pasted it into my content page ... as it... without changing. 
  In particular i've pasted it, into a panel, that will show whith a "modalpopupextender". 
  It works. But what it not work is when i click the paypal "Buy Now" button. 
  My web page don't redirect to paypal, modalpopup disappears and nothing happens.</p>