This section is a comprehensive reference guide to all HTML tags, including standard
tags and those introduced by Netscape Navigator and Microsoft Internet Explorer. For each tag, we've provided sample code and indicated the following:
 The version of HTML with which the tag is associated
 Whether browsers widely support the tag
 Whether to pair the tag with a closing tag
For each tag's attributes, we've provided sample code and indicated the following:
 The version of HTML with which the attribute is associated
 Whether browsers widely support the attribute