control arduino with ENC28J60

hi guys hope to have a nice day i have a enc28j60 ethernet module & a webpage : pb.ncsm.ir/pb.php if click on ON button link changed to : http://pb.ncsm.ir/pb.php?led=on if click on OFF button link changed to : http://pb.ncsm.ir/pb.php?led=off so how i can notice the link changes to change State of a pin on arduino