Form opening result in new window

Hi

I have a form in my site. It use PHP to send info to a mySQL database. The form is in the front page of my site.

The only problem is that too see the result the page changes and I want it to do one of 2 things:

  • open in a new window;
  • open in a new smaller window.

Can anyone help me?

Here is my code:

<p>... e receba novidades e promoções exclusivas a clientes. Preencha o seu e-mail e clique enviar.</p>
<form action="http://www.gohopa.com/mailpro/subscribe.php" method="post" 
style="background:#f6f6f6; border:1px solid #e8e8e8; width:295px;">
  <input id="FormValue_EmailAddress" class="text_input email" value="" name="FormValue_Fields[EmailAddress]" size="30" type="text"  
  style="
  border-style: solid;
  border-color: #FFFFFF;
  border-width: 0px;
  color: #ABA5A5;
  height: 24px;
text-transform: uppercase;
font-size: 8pt;
  "
  />
  
  <input type="image" src="http://www.ruiganga.com/pt/wp-content/themes/cudazi-luxury/images/enviar_icon.gif" value="Search" id="searchbutton" class="right" />
  
  <input id="FormValue_ListID" name="FormValue_ListID" type="hidden" value="499" />
   <input id="FormValue_Command" name="FormValue_Command" type="hidden" value="Subscriber.Add" /> 


</form>