If:
page 1 has values A,B,C
page 2 has values C,D,E
page 3 has values E,F,G
1, 2 and 3 can call page 4 which will return back to the calling page.
At present I would hard-code into page 4 HIDDEN fields for A,B,C,D,E,F and G as these are all potential entries that could be passed into 4 and...