For upcoming offerings, go to the CS Dept home page and, under "Student Resources", click on the link for the semester schedule of interest to you.
This will list all CS offerings for that semester. The web courses can be identified by the "Sites" web2, web5, and web7. A listing of all distance offerings, web and televised, is given at the bottom of the schedule page.
From the schedule, dtermine the name of the course's instructor. Then, from the CS Dept home page, use the "Diretory->Faculty" link to find the home page of your instructor. You should find links to current and next semester courses there, as well as contact info for the instructor. (Most faculty will appreciate it if you look at the posted course info before calling or emailing.)