[cxS]

What do you mean by "online language" and as the above member mentions, anyone who mentioned HTML is wrong, because HTML is not an official programming language. I would say Batch is the easiest, unless you want to consider things like Smallbasic and other really dumb languages. As for the hardest, I would say it's a tossup between C and C++. Why? Lots of people say C is easy but I've seen very few people who can actually write good C code. It's less forgiving than C++ on a few things. C++ on the other hand is a larger language; ton's of features, datatypes, etc...