need help in switch point..

i made a dice board game juz like monopoly.. now i wan to add in a second path inside my board game..
lets say path 1 is point[]p1, and path 2 is point[]p2..
and my player is in 1 of the point in p1.. so now, i click a button, i need it to detect the point of my player location and switch my path into p2 on the same spot.. and i can continue in a different path.. i need to noe the code to switch my path.. thx