pick a random word then stop it being picked again?

I've used an Ajax object to read my text file, which picks a random string of text. what the best way to ensure that it doen't pick it again?

I was thinking somehow copying the original text file (before the game starts) then as its picked delete it from the copied file?

How would i do this and is there another?

Cheers

The advanced random plugin includes a "permutation table" system. This is similar to taking a deck of cards, then shuffling it. You can choose the size of the table, and what the starting number is. Then you can just read from start to end to get random non repeating values. Does that help?

Another option is to load all strings into an array. Pick a random string (array X index), then delete it from the array.

Cheers guys i'll have a look at that plug in, but try the array option :)

Thanks :)