In any case, if you want to create for the web you’re going to need JavaScript. Because of the close relationship between HTML, CSS, and the web, it’s useful to have a well-rounded skill set ...

If you haven’t programmed in JavaScript before, the "Intro to JavaScript" is a wonderful free course that helps you graduate ...

Output: The results of executing the CSS, HTML, and JavaScript entered into the sections of the page. Figure A shows jsFiddle loaded in Internet Explorer 9 with empty code panes.