Want to learn how to do "online" editing like wikipedia?

[Xaverria]

Those who being to wikipedia can edit the article with only their IP address.

I would like to implement this function in my TCM website.

But I'm unable to find any information or algorithm that i can follow or refer to.

Can anyone help me??

[timeshifter]

IP address is picked up automatically as a server variable. Using ASP.NET, it's pretty easy to manage stuff based on it. I've written a few sites that logged IP address automatically, and one even had a blacklist feature based on IP, designed for spammers. Do some Google-ing and I'm sure you'll find plenty of stuff. If you need more specific help, please post in one of the specific technical forums. This would probably fall under ASP.NET or PHP, depending on your language.