Java Script Password

When creating a website and using a java script  is not as safe because you are able to view the source of the information and the usernames and passwords by simply clicking the "Page" button and seleccting the "view source to view the Website's script.
This is not good because the information is not protected and can be acceced by anyone. The level of security on this website is very minimal.

This an example of my sample site and how you are  to access the script and the information on it.