The six heading levels (H1-H6) indicate section headings. Heading
1(H1) is rendered as the largest and most important section heading while
Heading 6(H6) is rendered as the smallest (lowest importance) heading.
Description:
This indicates the alignment of the heading text in the browser window.
Values:Left
[DEFAULT] | Center
| Right | Justify
Clear
2 | 3
| 3.2 | 4
| IE | M
| N | O2.1
Required? No
Description:
This attribute helps an author in situations with floating objects (images,
tables, etc.) produced through the Left and
Right ALIGN attributes. It allows content to stop being
flowed around the floated element.
Values: None
[DEFAULT - No special line breaking
effects are applied relative to the floating element.] Left [breaks line after this element
and moves down vertically until the right margin is clear of floated
objects.] Right [breaks line after this element
and moves down vertically until the right margin is clear of floated
objects.] All [breaks line after this element
and moves down vertically until both margins are clear of floated objects.]
Historically, this element has commonly been used solely for its
font sizing features and even though the character formatting elements
BIG, FONT and SMALL are now available, headings can still be used for
this purpose (and Headings are still more widely implemented than
these other elements.)
Mixing Headings and FONT elements (especially those with SIZE attributes)
is possible, and is actually a good idea for backward compatibility.
Browser Peculiarities
Mosaic has always supported another heading size, H7, which has a lower importance
than H6 and is rendered smaller.
Netscape versions 1.0-1.22 only understood ALIGN values of LEFT and CENTER.
Support for ALIGN=RIGHT began in version 2.0.
The 'justify' value of the ALIGN attribute is currently only supported in
the 4.0 Beta 2 and above versions of Netscape and Internet Explorer.