Locked Columns in a Scrollable Datagrid

We are currently developing the second generation of our applications. It was a great success last year. All users love it and give the application very good feedback. When people love something they'll want to make it better and better. That's why we have so many enhancements and feature requests from users. Isn't it nice when people love things that you develop...

One of the features that we worked on this morning is to lock table header and paging navigation in a scrollable datagrid. Not only that they also want to lock the first two column that shows employees' first name and last name on the left so that it stays on the left when they scroll the rest.

We found a couple of solutions from the web. If you worked on IE only the solution using CSS with dynamic expression works fine. If it has to be cross browser try this solution to use CSS positioning.

We had also found this pure javascript control and solutions that create a custom datagrid. And also this one.