rake aborted error.

Hy guys, how I fix this problem?
I saw others topics but not solved.
Link to view errors: http://pastebin.com/pYCdgX4K

When I submit on terminal:
rake -T

He return errors(in link)

This error happens when I submit db:create in my app folder.

What do you see when you follow the instructions on line 2:

Could not find a JavaScript runtime. See
https://github.com/sstephenson/execjs for a list of available