If you want to improve your online presence such as adding interactive features, graphics, and other gimmicks to your website but do not have any background in computer programming, Javascript is the right tool for you. It is an easy to learn and use programming language even for non-techies.
Online Javascript tutorials
There are a lot of sites where you can begin learning Javascript. Online Javascript tutorials are available and even some are free. Just search through the Internet until you find the site that you feel is most helpful.
Short courses on Javascript programming
If you prefer to have the traditional classroom setting over self-study, there are a lot of schools and foundations that offer short courses on Javascript programming. These do not come for free, but are more comprehensive and extensive.
Whatever way you decide to learn Javascript, it is always best to have Javascript programming books as reference. Popular books are "JavaScript Bible, Fifth Edition by Michael Morrison" and "JavaScript Examples Bible: The Essential Companion to JavaScript Bible by Danny Goodman."