Testing over a network

I am in the process of moving my companies training program from paper to digital. I would like to host tests over our network so they can be completed over night by our night shift but I am unsure what medium I should use. I have programmed flash and HTML for quite some time but I do not have any experience with ASP or any other related technologies. I do not mind learning something new but due to time constraints I would like to use a method I can learn quickly and perhaps use some of the programming skills I already have.