<!--Using the Button to generate option fields -->
<form name="_xclick" action="https://www.paypal.com/us/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="ks422@fac.aii.edu">
<input type="hidden" name="currency_code" value="USD">
<input type="hidden" name="item_name" value="T-Shirt">
<input type="hidden" name="amount" value="10.00">
<table>
  <tr>
    <td>
    <input type="hidden" name="on0_1" value="Size">Size</td>
    <td>
    <select name="os0_1">
     <option value="Select a Size">Select a Size
    <option value="Small">Small
    <option value="Medium">Medium
    <option value="Large">Large
    </select></td>
  </tr>
  </table>
<input type="image" src="http://www.paypal.com/en_US/i/btn/x-click-but01.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
</form>
