Sonu Kapoor over at DotNetSlackers.com has, not only a great site, but also some great AJAX controls. He’s always looking to improve his controls and today he stumbled across something. He was working on a prototype where he had a div nested inside of an AJAX tabControl. The div had the property onscroll set. When the div was inside the tabControl, the onscroll function didn’t work. However, outside of the tabControl, it did. Turns out he missed adding the CssStyle to set the proper height/width of the div for the overflow css property and onscroll javascript function to work properly. It’s a really simple thing to overlook.