I am making a game that will inolve the user to 'click' around the map...
for example he will start off at 1A and travel south to 2A. 2A is now displayed like this:

Http://www.website.com/main.php?id=2A

i need help to stop the user from simply changing this to something else e.g:

Http://www.website.com/main.php?id=28D


So far it works like this:

When the user goes to 2A, i use a MYSQL database which holds what posistion is North, east, south and west...

When the user chooses his desination the database loads (For example, 3A) and will then take the values of North South East and West for 3A.

Any Ideas?

Cheers

Well, you could use POST rather than GET.