I have a script which uses the keyboard to move through a maze which is stored in a mysql database accessed through php pages. It works out if a move is possible based on the map.
It works fine most of the time however if you hold down a direction button and move towards a wall that is not adjacent (ie you have a run up) then it will let you run through walls, how many wall squares it lets you run through is random.

This is achieved through the following code:

var watching:Boolean = true;
var keyListener:Object = new Object();
keyListener.onKeyDown = function() {
if(watching==true)
{
watching = false;
if (Key.getCode() == Key.LEFT) {
moveLeft();
}
else if (Key.getCode() == Key.RIGHT) {
moveRight();
}
else if (Key.getCode() == Key.UP) {
moveUp();
}
else if (Key.getCode() == Key.DOWN) {
moveDown();
}
watching = true;
}
};
Key.addListener(keyListener);

The moveUp,moveDown etc functions check to see if a square is accesable and moves if it is. Using the watching variable as a guard seems to make no difference so I'm rather confused. If anyone has any ideas where the problem might be then please let me know.