Text Basics - HTML and XHTML: The Definitive Guide - page 169

4.6.6.2. The class, id, style, and title attributes
Use the style attribute to specify an inline style for the <center> tag, or
use the class attribute to apply a predefined style class to the tag. [ In-
line Styles: The style Attribute, 8.1.1 ] [ Style Classes, 8.3 ]
You may assign a unique ID to the <center> tag, as well as a title, using
the respective attribute and accompanying quote-enclosed string value.
[ The id attribute, 4.1.1.4 ] [ The title attribute, 4.1.1.5 ]
4.6.6.3. Event attributes
As with most other tagged segments of content, user-related events can
happen in and around the <center> tag, such as when a user clicks or
double-clicks within its display space. The current browsers recognize
many of these events. With the respective on attribute and value, you
may react to those events by displaying a user dialog box or activating
some multimedia event. [ JavaScript Event Handlers, 12.3.3 ]
4.6.7. The <listing> Tag (Obsolete)
The <listing> tag is an obsolete tag, explicitly removed from the HTML
4 standard, meaning that you shouldn't use it. We include it here for his-
torical reasons because some browsers support it, and it has the same
effect on text formatting as the <pre> tag with a specified width of 132
characters.