There are a lot of ways to find out, but one is: if it doesn't have 24pa it's NTSC. PAL is European/Asian/Australian television standard. NTSC is what your region is using.
PAL shoots 25p instead of 24p, and I am told there is no or noticable difference in appearance. If you're just shooting for the web it does not matter what version you have, but a soon as you want to put it on DVD and are aiming at televisions as a medium, you'd want to use the standard that's common around you. Most US DVD-players (and televisions) don't show PAL video. Lucky for me, most European DVD-players are region-free on top of that are willing to understand PAL and NTSC.