HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

These three programming languages are tools that you can use to create, design and style your very own website.

IMHO there is no real reason today why you should restrict yourself by not using Javascript for your Website—the only reason may be that you don't have any use for it.

Always test your pages using Google’s own tools and third-party resources to view the rendered HTML to make sure all your content is showing up.