Thanks! I'm ashamed to say I'm not sure where to find server log... but I'll have a root around.
on inspecting elements using chrome it's bring up
Uncaught TypeError: object is not a function ratingtest.php:78
anonymous function) ratingtest.php:78
And when clicking any of the stars it then gives:
Uncaught TypeError: Cannot call method 'split' of undefined ratingtest.php:59
(anonymous function) ratingtest.php:59
I'm a bit lost now tho, I've googled the errors and read some stuff and am guessing there are just some errors in the script at the bottom.