Click parts of main banners

[qmjhlpei]

Hey, I am pretty new to website making and I have a question I was hoping someone could answer.I've seen on lots of sites (ie www.bostonbruins.com) that on the banner or other web graphics you can click on a certian part of the graphic,like the "home" on the Bruins main banner.Like it's not a button because it's a part of the banner in a jpeg or gif,but you can still click on a certian part like it was a button.


Can someone explain to a newb like me how this is done?

Thanks

[CMcMahon]

Image maps, most likely.