Paypal forms master and content pages mixup

I created a paypay buy now button with their wizard.  Their code looks like
<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="4792165">
<input type="image" src="https://www.paypal.com/en_US/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>

I put it in a content page.  When I clicked nothing happened.  I turns out the master page encompases the content pages is a form.  Like this
    <form id="form1" r ...