Pages that use cascading stylesheets load in the browser window much faster than pages that are individually formatted with HTML text attributes—and most modern browsers support CSS. However, there may be cases in which you want to use HTML text attributes. If you use HTML style attributes in conjunction with CSS, keep in mind that some HTML text attributes rely on the font element, which is known to interfere with CSS. HTML text formatting attributes that use the HTML font element include the Font or Size menu in the Type menu. Because the font element can interfere with CSS, you should avoid mixing these two formatting methods in a single document.

To avoid browser problems, you can add a browser switch script to your pages that redirects browsers to alternative pages that you’ve strictly formatted with either HTML text formatting attributes or CSS.