I follow this example:
http://plnkr.co/edit/UhNka4VaaRRGY1TK32LE?p=preview
I copy the code and modify it. My question is what is the link that I muse use to pay with paypal sandbox.
url: "http://166.78.8.98/cgi-bin/aries.cgi?sandbox=1&direct=1&returnurl=http://166.78.8.98/cgi-bin/return.htm&cancelurl=http://166.78.8.98/cgi-bin/cancel.htm"
In this example he uses http://166.78.8.98/cgi-bin/aries.cgi?
I must use another link because it's not correct. Anyone can help me?