HTML and CSS Reference
Internet Explorer 8 users don't need to install anything additional to gain access
to a powerful set of debug tools. Just choose Tools ➪ Developer Tools to modify
your CSS and see the effects instantly, all in the browser. Safari 5 also has nice
built-in developer tools. In Preferences, go to the Advanced tab and choose the
Show Develop Menu in the Menu Bar option.
In this Try It you learn how to validate a CSS file.
You will need the file style.css from the Lesson_05 folder, a text editor, and a web browser.
You can download the code and resources for this exercise from the topic's web