>>>a) Just use random() to select the page assuming I'll end up with even distribution (its 50/50 no?)Well.... Yes and no. If you get a large enough sample, it will come close to 50/50. Keep in mind, every time you hit it, each option has at that moment a 50 / 50 chance of coming up. It's close enough if you don't need it to be a perfect distribution of 50 / 50. I would recommend using RandRange(1, 2) for simplicity sake.
b) Store the last viewed page in an application var, single thread it, and toggle it on each visit to load the correct page and prepare it for the next request. Will this be a bottleneck? It would be a pretty small piece of code.. I would use this if you really have to have a perfect distribution of 50 / 50 OR if you have a non technical boss who insists on testing it and wants to see the A/B split every time he reloads the page. It's more complex, but may make you boss happier. =] -- Alan Rother Adobe Certified Advanced ColdFusion MX 7 Developer Manager, Phoenix Cold Fusion User Group, AZCFUG.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:324872 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
