I'm searching for a song that I've heard so many times before, but can't find it now that I want to look for it. I tried doing a site where you play out the tune and the computer tries to find it for you... but that failed spectacularly.
It was here: http://www.musipedia.org/flash_piano.html
and I played this: c1-1068 d1-585 e1-1816 e1 ( the first 4 notes)
If that helps. I think it was played in cartoons a lot.