W3Schools for HTML and CSS To learn JavaScript you must have some basic knowledge of HTML and CSS. For that w3schools provides some fairly good step by step tutorials for the bare basics.

Run the JavaScript file upload example The files used in this example, along with a folder named upload, must be added to the htdocs folder of AHS. When a client accesses the uploader.html file ...

On July 18, Google added a JavaScript SEO basics section to its Search developer’s guide. It includes general descriptions of how Google processes JavaScript as well as some best practices.