iframe limit random repeats

[rysmith]

1) Script Title: IFrame Limit Random Repeats

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...ndomiframe.htm

3) Describe problem: I want to prevent a (randomly selected) URL from appearing again for a certain number of reloads. For example, a displayed URL would not be selected again for the next (5 or 10) times.