Greetings of Day.
If you use Google analytic for tracking someone, you will loose as soon as he switch. for eg go to another of your page or close the browser and come back direct to your site using history. Thus we need a system which can store ip address( for say 24 hrs) and can track any activity by him.
This is system depends upon:
---------- oops. You already provide your site link.
Steps:
1. Give your referrals links like: http://yoursite/refpage?id=refid
2. We save ip-address of anybody who comes through that link and redirect to a page say: http://yoursite/index
3. When a sell will happen from that ip-address within 24 hrs, referral will be awarded.
4. If anyone from that ip-address registered with us, then referral will always awarded when that user buy [or as your referral plan].
Since your site is in html, means no step 4.
This is basic Plan.
warm regards
PBM