Heading

The Heading element, shown as "h1, h2, h3, and so forth" identifies the hierarchy of sections of a web page. It assists scanning for sighted users and provides context to visually impaired persons though triggering responses from assistive technology.

Code Example:

<h1>Tags</h1>
<h2>Heading</h2>
<p>The Heading element, shown as "h1, h2, h3, and so forth"
identifies the hierarchy of sections of a web page.
It assists scanning for sighted users and provides 
context to visually impaired persons though triggering
responses from assistive technology.
</p>
<h3>Browsers</h3>

Browsers

Both Internet Explorer and Netscape Navigator put Headings in proportionally-sized font. The size of this font can be controlled by style sheets, but be sure to use a relative measure such as ems or percent. Otherwise personal browser settings may be overridden.

Adaptive Technology

Home Page Reader beeps when it encounters a heading. You can tab through document headings by pressing Alt + 1. JAWS announces the number of headings when it loads a page and identifies the relative importance of headings as "Class 1 heading, Class 2 heading, and so forth."