Netscape Extensions to HTML

Additions

<isindex [prompt="..."]>

Document is a searchable index.
Added attribute:

prompt: Message you want to appear before the text input field of the index

<meta http-equiv="Refresh" content="...">

Generic Meta-information (for the dynamic updating, so-called client pull)
Attributes:

http-equiv

HTTP response header name (Refresh|...)

content

Refresh time, in seconds

content="n"
Reload this document in n seconds
content="n; url=http://server/doc.html"
Reload other document (http://server/doc.html) in n seconds

<hr [size=...] [width="..."] [align=...] [noshade]>

Horizontal rule (default: a shaded engraved line)
Added attributes:

size: Thickness of horizontal rule
width: Width of horizontal rule, in pixels, or in percent of document width
align: Position relative to page (left|right|center)
noshade: No fancy shading

<ul [type="..."]>...</ul>

Unordered, or bulleted list (default progression of bullet types: from a solid disc, to a circle to a square)
Added attribute:

type: Bullet type (disc|circle|square)

<ol [type="..."] [start=...]>...</ul>

Ordered, or numbered list (default enumerate type: Arabic number, i.e., 1)
Added attribute:

type: Enumerate type (A|a|I|i|1)
start: Default start number

<li [type="..."] [value="..."]>...[</li>]

List item
Added attribute:

type: Item type (disc|circle|square (in the unordered list), A|a|I|i|1 (in the ordered list))
value: Count for the ordered list

<img [lowsrc="..."] [align=...] [width=...] [height=...] [border=...] [vspace=...] [hspace=...]>

Image
Added attributes:

lowsrc: Low resolution images spec
align: Position relative to text (left|right|top|texttop|middle|absmiddle|baseline|bottom|absbottom)
width, height: Width and height of image; add to speed up display of the document
border: Thickness of border around an image
vspace: Vertical space above and below the image (for the floating images)
hspace: Horizontal space to the left and right of the image (for the floating images)

<br [clear=...]>

Line break
Added attribute:

clear: Move down until a given margin for the floating images (left|right|all)

<body [background="..."] [bgcolor="#rrggbb"] [text="#rrggbb"] [link="#rrggbb"] [vlink="#rrggbb"] [alink="#rrggbb"]>...</body>

Document body
Attributes:

background: Image tiled the full background of the document-viewing area
bgcolor: Background color; a hexadecimal red-green-blue triplet of color
text: Foreground, or text color; same as bgcolor
link: Color of link text; same as bgcolor
vlink: Color of visited link text; same as bgcolor
alink: Color of active link text; same as bgcolor

<hx [align=...]> ...</hx>

Heading, level x (x = 1..6)
Attributes:

align: Horizontal alignment (left|right|center)

<p [align=...]> ...[</p>]

Paragraph
Attributes:

align: Horizontal alignment (left|right|center)

New Features

<nobr>...</nobr>: No line break in a text
<wbr>: Word break
<font size="...">...</font>: Absolute or relative font size, ranged from 1-7; the default size is 3.
<basefont size="...">: Base font size ranged from 1-7; the default size is 3.
<center> ...</center>: Centering of text
<blink> Blinking of text</blink>

New Entities

®: Registered trademark: ®

Tables

<table [border[=...]] [cellspacing=...] [cellpadding=...] [width=...] [height=...]>...</table>

Table
Attributes:

border: Draw border
cellspacing: Cell spacing; the default spacing is 2.
cellpadding: Cell padding; the default padding is 1.
width: Width of table, in pixels, or in percent of document width
height: Height of table, in pixels, or in percent of document width

<tr [align=...] [valign=...]>{(<td>|<th>)...}*[</tr>]

Table row
Attributes:

align: Horizontal alignment (left|right|center)
valign: Vertical alignment (top|middle|bottom|baseline)

<td [align=...] [valign=...] [nowrap] [colspan=...] [rowspan=...]>...[</td>]

Table data cell
Attributes:

align: Horizontal alignment (left|right|center)
valign: Vertical alignment (top|middle|bottom|baseline)
nowrap: No word wrap
colspan: Columns spanned
rowspan: Rows spanned

<th [align=...] [valign=...] [nowrap] [colspan=...] [rowspan=...]>...[</th>]

Table header cell
Attributes:

align: Horizontal alignment (left|right|center)
valign: Vertical alignment (top|middle|bottom|baseline)
nowrap: No word wrap
colspan: Columns spanned
rowspan: Rows spanned

<caption [align=...]>...</caption>

Table caption
Attribute:

align: Position relative to table (top|bottom)

Fumio HOSONO <hosono@si.gunma-u.ac.jp>

Netscape Extensions to HTML

See also this orignal page.

Additions

New Features

New Entities

Tables