My horizontal scroll bar disappeared?

I was checking the iTunes store when I accidentally hit my keyboard and my horizontal scroll bar disappeared. I have a standard screen moniter, so I have to move my screen horizontally whenever I want to buy an individual song. I have no idea what buttons I pressed and I don't know how to get my scroll bar back.|||itunes appeared to have really dropped the ball here but there is something you can do until they fix it, click on edit, then preferences and then on store, here you can check on the use full page option, not ideal but will do the job temporarily!|||log out, log back in.