<form action='https://www.sandbox.paypal.com/cgi-bin/webscr' method='post' name='paymentfrm'>
<input type='hidden' name='cmd' value='_xclick-subscriptions'>
<input type='hidden' name='business' value='your_paypal_email_here'>
<input type='hidden' name='item_name' value='product_name_here'>
<input type='hidden' name='item_number' value='1'>
<input type='hidden' name='rm' value='2'>
<input type='hidden' name='return' value='http://returnwebsitehere.com'>
<input type='hidden' name='currency_code' value='USD'> 
<input type='hidden' name='usr_manage' value='0'> 
<input type='hidden' name='sra' value='1'>   
<input type='hidden' name='a1' value='2.72'> Period 1 price initial charge (keep it AED 9.99 ~ USD 2.72) 
<input type='hidden' name='p1' value='4'> period 
<input type='hidden' name='t1' value='W'> in weeks
<input type='hidden' name='a3' value='39.00'> full amount to be charged after trial period
<input type='hidden' name='p3' value='1'>
<input type='hidden' name='t3' value='D'>
<input type="image" name="submit" border="0" src="https://www.paypal.com/en_US/i/btn/btn_subscribe_LG.gif"
alt="PayPal - The safer, easier way to pay online">
</form>