@OP: That is the most pagination I've seen in my life. Are these pages/tables generated on the fly or you receive them from the network as soon as the website is opened?
Obviously on the fly.
What OP probably does is generate some private keys on the user's end through Javascript based on which page you are; if the address is not empty, sends the private key to his server. Where he can send the coins to his own wallet.
Basically, everybody that tries this is using his own hardware power to brute-force private keys for OP. Free work.