Web - Client

how pass this challeng http://www.root-me.org/en/Challenges/Web-Client/Javascript-Native-code
somebody help me in this challenge.

Hint: Do you know the meaning of "red herring"?

Replace the () at the end with [stop spoil]

Make use of console as much as possible.

Do some research on the challenge name and how to de.....no more

do some research on deo......
Please notice the topic also.

is there any way to trace the memory stack of javascript running in a browser ?

yes it is possible , but you need to do a little bit research. Firefox will help you. (it is hint for you)