I see this question from time to time, where someone wants to provide several PayPal buttons on a Community Server page.  This is actually a .NET issue, since each PayPal button is contained in a separate form, and only one form is supported on a .NET page, but Community Server is .NET (at its best - wink! wink!) so there it is.

As I said, each button is in actuality a form.  What we want to do is to take the form and convert it into a url.  Textpad is great for this, where we take each "name" input item and make it a querystring item.  Form on top, our url (which does exactly the same thing) is below.

 <form action="https://www.paypal.com/cgi-bin/webscr" method="post">
         <input type="hidden" name="cmd" value="_xclick" />
         <input type="hidden" name="bn" value="webassist.dreamweaver.4_5_0" />
         <input type="hidden" name="business" value="me@DBVT.com" />
         <input type="hidden" name="item_name" value="Premium Membership, DBVT.com; 2 year subscription rate." />
         <input type="hidden" name="item_number" value="PM2" />
         <input type="hidden" name="amount" value="85.00" />
         <input type="hidden" name="currency_code" value="USD" />
         <input type="hidden" name="return" value="http://DBVT.com/user/CreateUser.aspx?ReturnUrl=" />
         <input type="hidden" name="cancel_return"  value="http://DBVT.com/user/CreateUser.aspx?ReturnUrl=" />
         <input type="hidden" name="undefined_quantity" value="0" />
         <input type="hidden" name="receiver_email" value="payments@DBVT.com" />
         <input type="hidden" name="mrb" value="R-3W123445670XBOGUS" />
         <input type="hidden" name="pal" value="ANN123446789BOGUS" />
         <input type="hidden" name="no_shipping" value="1" />
         <input type="hidden" name="no_note" value="0" />
         <input type="image" name="submit" src=http://DBVT.com/images/misc.images/paypal-2year.gif
         border="0"  width="125"  height="80" alt="Thanks for your support!" />
</form>

becomes...

<area shape="rect" coords="512,894,687,934" href="https://www.paypal.com/cgi-bin/webscr?
cmd=_xclick&amp;bn=webassist.dreamweaver.4_5_0&amp;business=me@dbvt.com&amp;
item_name=Premium Membership, DBVT.com; 2 year subscription
rate.&amp;item_number=PM2&amp;amount=85.00&amp;currency_code=USD
&amp;return=http://dbvt.com/user/CreateUser.aspx?
ReturnUrl=&amp;cancel_return=http://dbvt.com/user/CreateUser.aspx?
ReturnUrl=&amp;undefined_quantity=0&amp;receiver_email=me@dbvt.com&amp;mrb=R-
3W123445670XBOGUS&amp;pal=ANN123446789BOGUS&amp;no_shipping=1&amp;no_note=0"
target="_top" alt="2-Yr Subscription" />