I run a small comp lab and I would like to use squid running in one of the machines in the internal network, sometimes (when many students need to basically access the same files) but some other times I would let them go online through some ISP's proxy server ~ This is more of a browser thing, but I could imagine some of you have dealt with these kinds of issues before ~ Is there such a thing as a way for browsers (IE and Firefox) to detect proxy settings on the fly when they start up and if first proxy settings don't work then proxy settings B should be used? ~ Thanks lbrtchx