The four pins on the side are jumpers for configuring master/slave arrangement. When SATA hit we stopped having to muck around with jumpers (thank god).
It's been a while so I'm a bit hazy, but that looks like an old ATA connector - a quick look on your laptop indicates it supports ATA-7, which I believe is identical to the first revision of SATA. It's possible a SATA drive would work as long as you can find an adapter that converts the plug into pin format. Looking online they're not cheap, however.
ATA drives themselves are hard to find these days and are not nearly as large in capacity as SATA ones. If there's any doubt, of course, you should check the label on your existing drive.
edit - I forgot to clarify one thing - ATA and IDE are the same thing. IDE is kind of an archaic acronym, but it's still in use. The various ATA revisions are all backwards compatible with each other, too, so if your laptop supports ATA-7 it will also handle any previous ATA drive.
PATA is what ATA was renamed to when SATA came out to help distinguish between the two (parallel versus serial), although a lot of people still say IDE.
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