This document is styled the way it is to expose browsers' default behavior associated with the ABBR element.
Check the source code of this document to understand what these two scripts do:
ABBR element). The TITLE attribute is removed from the element, then the expansion of the abbreviation is done in plain text followed by the ABBR inside parentheses.The text (not the markup) below is an excerpt from an article published on Accessites.org
DOCTYPE tells you to use a Strict DOCTYPEYou may not be aware, unless you’ve read the actual DOCTYPE documents themselves (and frankly, who wants to do that?) that the HTML 4.01 Transitional DOCTYPE tells you to avoid using the HTML 4.01 Transitional DOCTYPE if you can.
This is the HTML 4.01 Transitional DTD, which includes presentation attributes and elements that W3C expects to phase out as support for style sheets matures. Authors should use the Strict DTD when possible, but may use the Transitional DTD when support for presentation attribute and elements is required. — W3C
There is no direct reference in the XHTML 1.0 Transitional DOCTYPE, but it does point out that it should be treated as HTML Transitional except for changes due to XML.
This is the same as HTML 4 Transitional except for changes due to the differences between XML and SGML. — W3C