Well i dont think so, i could be wrong since i m not a genius asp programmer, but from what i understand, asp is server side code, and needs to be parsed by the server, so u have to create an asp page, that will have your asp code in it, and u can put html tags in that asp page, but not the other way around.
You could try this link:
http://www.asp-counter.co.uk/counting-active-visitors.asp