There are many solutions for this out there but I haven’t found any of them for free or as Open Source, so here we are going to learn how to make one from scratch. This version is written in Action Script 3, and it is part of the FlexTutsLibrary. If you want to know what the final product of this tutorial looks like, see it here: view Demo.

To get the FlexTutsLibrary for your projects go to the FlexTuts Library section and download the latest release.