Does my laptop has a dvd burner?

I'm currently using Acer aspire laptop model 4520. Actually it came with Window Vista Home Basic but I changed it to window XP instead. Does this laptop equipped with a dvd burner because I can't burn any dvd's so far?? FYI, I'm using DVD -RW when doing the recording on my handycam. The brand is Hitachi and I've already downloaded the driver to my laptop? Do I need to purchase external dvd burner? Pleazzzz, help me.