How can i reinstall my node?

Yesterday, i try to uninstall node.js from my ubuntu. But i can uninstall only npm from my computer, surely. Now i want to uninstall node.js from my ubuntu(12.04) and install again. Firstly, please let me know about uninstalling node.js after I'll install it again.

I'm waiting..

This might help. It's not for ubuntu specifically, but it shows how to unintall node on linux.