Conclusion

Style sheets bring rich and powerful presentation techniques to the Web. Further, the ability to separate presentation rules into a separate file simplifies HTML authoring, and makes it easy to establish and maintain a consistent presentation even across the largest Web site. Here, we have shown only a few of the basic and commonly used capabilities available through style sheets. Other online resources, such as those listed in the World Wide Web Consortium's Cascading Style Sheets page go into much greater detail.

For the CSS rules to act properly on your HTML document, it is important that the HTML and the CSS be error-free. If there are any errors in the HTML or in the CSS, the different browsers will react differently, apply the style in an unexpected way, or not apply the style at all. The online HTML and CSS validators listed in the references section make it easy to ensure that the CSS and HTML that make up your documents are error-free. We strongly encourage their use.

Viewing this page in different browsers can also be an instructive experience. Different browsers treat CSS differently. Web page authors should familiarize themselves with the characteristics of the various browsers by viewing this and other pages in a variety of browsers, and by examining the Browser Compatibility Charts at webreview.com.