Passing JS var to PHP in media manager

[Gloop]

I want to automatically make resized copies of images added to articles using the media manager. I've got a small PHP script that's meant to do this once the Insert button has been pressed.

I've added the script into the onclick function on line 39 of administrator/components/com_media/views/images/tmpl/default.php. I'm unable to post the relevant code, even in tags, so I've attached it as a text file.

I've set a JS variable toPass = document.id('f_url').value.

This is the URI of the file to be inserted into the artice given as "images/file.jpg". I want to to send this value to PHP variable $filename.

I've been trying for days now. I'm new to JS & PHP and was hoping this would be a fairly easy thing to do, but I hadn't realised how complicated it would be.

I've had no luck using JInput or anything else I can think of. I'm completely ignorant when it comes to forms and GET/POST etc, nothing I've tried there works either. I may well be barking up entirely the wrong tree. Any advice would be fantastic.

[harperlala]

you can use jquery API to get the value of your varriable.

[Gloop]

Thank you a million times over! I've got something working; not quite how I wanted it, it requires an external PHP file, but it's working.

If only I could buy you many beers!