How do i improve in javascript within a shortest period possible?

Answer 1

Well I think one of the best ways is to build an interactive website from scratch while learning on the go.

Answer 2

Go over the fundamentals again and try to understand JavaScript quirks behind the scene. If the need be visit sites given by @Nikola to get more insight. Finally play lots of challenges and don't give up when u lose. Always try to grasp the algorithm in the codes and don't chew or memorize answers at least for the start. Good luck and happy coding!

Answer 3

Work, work and more work ... :)

codeschool.com
codecademy.com
w3school.com