Hello, this guide was meant for academics in the discipline of politics but has examples of web footnoting and referencing in the Chicago style (specifically page 7)
Here's a helpful link from the Purdue Online Writing Lab
You have more stuff on the left menu, too. Great site.
I would add that if you are in the midst of a research project, it would be extremely wise to print off a hardcopy of your online source. I recently lost track of a manuscript because I didn't have the time/patience to print it off.