How to Change the Review Display Order?

[naturalintegrators]

Hi All
I'm running a 1.3.8a (with some add ons and tweaks); I'd like to change the order of the review that appears in the store.
The best solution for me should be a random order, anyway, if that's not possible, I'd like to periodically change the order of the review, but I don't know how to do it: I've looked at the database, but after changing one or two fields and getting an error I tought: "It's better to ask to somebody that knows how to do it!"
Thank You in advance

[stevesh]

There's a setting in Admin - Configuration - Maximum Values for Random Product Reviews for Sidebox.

[naturalintegrators]

Hi stevesh
sorry: I didn't explained well (sorry for my english ) I was meaning that I'd like to have a random order in the review page (the sidebox is fine ) they seems to be displayed ordered by date, but trying to change the date in the database nothing appened (it may be that I edited the wrong table)
Any idea?
Thank You for teh reply!