136773 XMLHttpRequest Help Needed

This should be really simple for someone with a great understanding of XMLHttpRequest. The project requires logging in to several accounts on a well known ajax social network site and being able to post new data to each selected account. This will need to be a web based script that can be managed from a centralised location. I will need to know whether each post was successful or not. If you could show that you have good experience with the XMLHttpRequest object that will be favourable Thanks for your interest!