searching for javascript (or others) that can be used in conjunction with PHP for file folder uploads

Greetings. (I've seen this subject discussed, but cannot find a solution in the archives.) I have a file upload site to which I need to add code for uploading of an entire folder/subdirectory ... I realize this can't be done in PHP alone but I'm hoping that a solution (possibly involving Javascript) can be found that can be added to my existing PHP solution ... I've seen ASP-related sites that can do this, but I can't find a way with PHP ... Can anyone point me to a javascript (or other) script that I can buy and incorporate into my PHP ? Thanks for the advice. Kenn