You can do impressive things with HTML and CSS. There are several examples on JSFiddle where developers implement the Sieve of Eratosthenes, a way to calculate prime numbers, with HTML and CSS. That ...

jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code right inside your browser.

While HTML, CSS and JavaScript are powerful tools, they tend to run out of steam with development of advanced web applications that store data on the client side and manage complex state transitions.

You can often copy a CSS class that you see and get it to work by pasting it into your own HTML pages. For instance, if you see a Web page that contains a colorful menu that you like, review the ...