i think it is ok, if you start with a small amount of funds that wouldn't affect you materially if you lost... even better is to use a service that allows you to make trades with "fake" money... that way if your investments underperform, you dont actually lose.
This practice should be avoided. Quite frankly, any investor should have a good basic knowledge of investing practices. And, online investing is certainly not for the novice and should only be initiated after sufficient knowlege has been accumulated. A warning, even those with much more than a basic background in investing have made horrible decisions while participating in online investing.
It can be a good idea for an investor if they have the money to really start some online investing, make sure you do some research on what you should invest into as well. Its all about making the right choice and sticking with it. It is never a bad idea to try to make money
It is a volatile time for investing right now (in May 2009), so there are definitely opportunities to make money in the short term, though the risk is also high. In the long term it is a great time to invest as the market is depressed and will go up.
You have to be really careful with investing on the Internet since their are many people out there who are trying to scam you. Since you are a novice I recommend that you rather go to a banking company and ask for a counseling session.
I think it is a great idea for a first time investor to get into online investing. It is cheaper than getting a broker that will charge you higher fees. With online investing, you can pay lower fees. Some suggestions would be opening up a Scottrade or Etrade account. They only charge $7 per trade.