<form target="paypal" 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="7845973">
<table>
<tr><.td><input type="hidden" name="on0" value="Amount">Amount<./td></tr><.tr><td><.select name="os0">
 <option value="Option 1">Option 1 $5.00
 <option value="Option 2">Option 2 $10.00
 <option value="Option 3">Option 3 $20.00
 <option value="Option 4">Option 4 $100.00
 <option value="Option 5">Option 5 $1,000.00
</select> <./td></tr>
</table>
<input type="hidden" name="currency_code" value="USD">
<input type="image" src="https://www.paypal.com/en_US/i/btn/btn_cart_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>