JQuery infinite scroll plugin

We are creating a web application with the ability to send messages to other users, and we decided to implement it using the Facebook method. The value is a fixed height div, the div scrollbar is at the bottom when the page loads. And when users scroll, we get old messages using ajax. (Pay attention to the facebook message application )

Does anyone know a good and stable jQuery plugin for infinite scrolling? I found many plugins for endless scrolling and lazy loading. But not one of them scrolls.

Thank!

Edit: April 16, 2012. Created my own jquery plugin for this.