I'm trying to use a simple webcam capture upload, upload isn't working?

I'm using this link

http://ift.tt/1EBdzvv

This one looks a lot better but may be the same thing

http://ift.tt/A6SyxI

What I'm concerned about is the data_uri, also the url upload

So the webcam works, shows my face, whatever, but I push this

<a href="javascript:void(take_snapshot())">Take Snapshot</a>

and nothing happens. I see the little grey box at the bottom left saying javascript:void(take_snapshot()) I'm wondering if I'm supposed to put a parameter...

There can be several problems, I am using domain mapping and the folder may be pointed incorrectly or it could be a file permission problem, I did chown with www-data

This is the upload.php as suggested or rather given by the first link

<?php
    // be aware of file / directory permissions on your server
    move_uploaded_file($_FILES['webcam']['tmp_name'], '/tabdater/uploads/webcam'.md5(time()).rand(383,1000).'.jpg');
?>

I'd appreciate any help.