How to add "add contact to IM" links? [SOLVED]

[biliousfrog]

Hi all,

Does anyone know how to implement an add contact to IM button? Microsoft has a tool that can create a button and all the relevent code for Windows Live Messenger but I wondered whether there's a way of doing the same thing for ICQ, AIM, Yahoo, MSN etc.?

I've just bought Trillian Pro and set up a new passport account for business use, I was hoping to add IM capability to my website but I'm not sure how to go about it. The only IM tools that I've found are for the very latest versions of Live messenger. Another option would be to add a chat facility but I'm clueless about that too.

[EDIT]

Just a quickie...I'm using ChatStat on my site, it's free and works brilliantly. Superb little tool, lets me know when someone's browsing the site, tells me where they are, allows me to ask them if they'd like any help, allows messages and call-back requests to be left and also allows up to two operators in the free version. Great little app.