I&#039m setting up an online information site which will function very similarly to an online store. I&#039d like to be able to assign each visitor an unique ID, unless they are logged in, which will be used to identify them to the site and bind a shopping cart to them (information files are zipped... it&#039s very similar to ZDNET.com&#039s download structure). I&#039d also prefer to pass this through the Query String, but will need someway to remember it in case the user types in a different site location.<BR><BR>Which would be the best way to accomplish this?<BR>Use Seesion ID, random number added to a cookie, or other?<BR><BR>Btw, are there any tutorials online with information on making a complete (advanced) "store"?