To everyone complaining about the attitude of some of those who replied:
The OP's question has an obvious answer. Obvious, that is, to anyone willing to think it through. But okay, some people just don't get things too easily. In that case, a simple Google search, or even a search of this forum, would have turned up the same question being asked and answered hundreds of times before.
Instead of doing either of these things, however, the OP decided to create a topic and ask this weary community the same damn stupid question yet again. This is what irritates people. They come here to read interesting topics, only to find the board filled with worthless pap such as this.
Some people just ignore it; it's just a message board, after all.
Others give up on the board and move to one that isn't crowded with morons who haven't heard of Google.
And finally, some people decide to go into the topic and yell at the poor, confused OP.
None of these actions actually address the root problem. The solution to this problem is to calmly and politely request the OP of topics such as this one to keep this in mind:
When you have a question, think on it first, Google it second, and only then post about it. If you refuse to do this, or do so only halfheartedly before giving up, you will continue to be yelled at every time you ask a question, because you will be wasting people's time. And at that point, frankly, you'll deserve it.