Javascript error by my Be theme muffing Group.

My add section does not work , I get an error Javacript . How can I fix this . It is with the theme of Be muffing Group.

The best and probably the fastest way to solve your problem is contact muffin group directly via their profile page or support forum. More information here: http://themeforest.net/user/muffingroup

Oke Alex thank you