As you continue learning HTML, CSS and JavaScript, keep practising and experimenting. You will gain confidence and improve your coding skills. This is a creative playground, so play around, try ...

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.

So, grab a copy of HTML, CSS, & JavaScript All-in-One For Dummies and you’ll be designing and building before you know it! Free offer expires May 20. How to get it.

Ryan Boudreaux includes all the code snippets you'll need in this demo of how to create an image hover-preview effect using HTML, CSS, and JavaScript.