Passing info in Environmental Variables

I'm looking to build a "cookieless" cookie that unobtrusively (via javascript or vbscript) attaches a string to an environmental variable of a web visitor. Then, when that visitor visits site #2, a second script can read that environmental variable and parse out the string. So that you FULLY understand what I mean... You visit Website #1. The tag calls a javacript function that causes your AppVersion to be called "Mozilla_bluegrass". (It doesn't have to be the AppVersion environmental variable - anything will do.) In other words, it added a string - in this case, "bluegrass", to the pre-existing info. Now, you see a link there with the URL http://www.website2.com. There is no cookie being created and no referring id information in the URL. But when the user clicks that link, website #2 has a "deconstructing" script that reads that environmental variable and parses the "bluegrass" term from the AppVersion. So they know who sent the visitor. Is this possible??? Can you think of another/better way to do this? Your brain energy is appreciated. * Note - Some people have commented to me that I could just use cgi or asp, etc. to pass info. I know how to do that. What I need is something that is entirely passive and invisible to the user. If someone clicks a link that says, "[login to view URL]", that's MUCH different from clicking a link that looks like... [login to view URL] But by using my idea I'd be able to pass the same amount of info. ## Deliverables Complete and fully-functional working script(s) and/or program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Platform IE 4+ Netscape 4+ Windows 9x+