I am looking for a script or instructions (tutorial) on how to create a page that has content (in my case list of software) and a few dropdown selections that when selected will filter the content below it based on what was selected. So for example one the dropdowns will say OPERATING SYSTEM and if you select WINDOWS it will display all software that can be used on Windows OS.
I do not care if it is a pre-made script or a tutorial on how to create it. It can use PHP, XML, etc. As long as it can do as I need it. Thanks in advanced.