How to disable edit forms fields with sharepoint

While working on one of the projects, an sharepoint edit form needed to have some fields to be disabled or readonly. I did not wanted to write custom code to achieve this, also was looking for a solution that would be quick, handy and would utilize the web developement experience, I thought of giving it a shot with Javascript ..... while researching more on this I saw Andrey Shchurov Blog where Andrey has discussed the similar solution using Javascript.

Thanks Andrey for pointing this out, you have saved lot of my developement time.