Saving/Loading Game

I am making a game where you have to defend a Fortress. Flash will record things like money, score, ammo, progress, etc into arrays/variables. I want the user to be able to click a button to save these variables to the local computer (not a database or anything, since I want this feature to work offline too). Then, when the user decides to quit the game and come back later, he can just click the load button, and this will load the game. Then it will load the variables/data from the computer so the player will be where he left off.