Any help with playing a game on my computer?

Ok I want to get the computer game called "Star Craft 2"and I have a t3508 emachines windows xp computer (no upgrades, just a regular emachines, its a pretty old model too) and I was wondering if the game is worth getting because I don't know if this computer is fast enough or would look good with the game star craft 2. Can someone please help?Any help with playing a game on my computer?
click this link, punch in your game, click run it, to see if your computer can handle the game.

http://cyri.systemrequirementslab.com/CY鈥?/a>