Thread:User talk:Yair rand/using AddAudio.js

Hi, Can you explain how to use User:Yair_rand/AddAudio.js ? I copied it to my common.js, and I get an error:

(unknown) JavaScript parse error: Parse error: Unexpected token; token 3 expected in file 'User:Shavtay/common.js' on line 344

Looking at the code, it is the line:

document.body.style.cursor = '';

Thanks a lot.