Details of NExtensions to HTML

<basefont size=size>

Changes the size of the basefont for the rest of the document. This affects text effects

<basefont size=2> Basefont is size 2, bold italic <tt>tt</tt> <basefont size=3> Basefont is size 3, bold italic <tt>tt</tt>

Basefont is size 2, bold italic tt
Basefont is size 3, bold italic tt

 : Inserts a line break
and continues on the next line.
 : this is some text, this is some text. After a line break
Text continues on the next line which has a clear left margin.
 : This is is some text, this is some text, After a line break
Text continues on the next available line with clear space along the right hand margin of the page.

<center>..</center>

<center>
Everything contained in the center tag is ..

centered </center>
You could use the proposed <align="center"> but it doesn't center everything

...

Absolute font sizes

<font size=1>1</font>
<font size=2>2</font>
<font size=3>3</font>
<font size=4>4</font>
<font size=5>5</font>
<font size=6>6</font>
<font size=7>7</font>

1 2 3 4 5 6 7

Mixing

Starting with the default font 
<font size=5>incr,</FONT>
<font size=7>ease,</FONT>
R
<font size=6>e</FONT>
<font size=5>d</FONT>
<font size=4>u</FONT>
<font size=3>c</FONT>
<font size=2>e</FONT>

Starting with the default font increase,Reduce

Fonts can be mixed.

relative to basefont

By changing the size from a number to an increment.decrement the resulting font size is relative to the basefont.

<font size=+2>
  2 sizes larger than basefont
</FONT>
<font size=-2>
  2 sizes smaller than basefont
</FONT>

2 sizes larger than basefont
2 sizes smaller than basefont

<HR [size=size] [width=width] [align=left|right|center] [noshade] >

size

<HR size=1>

<HR size=20>
width

<HR width=30>

<HR width=30%>
align

<HR width=50% align="left">

<HR width=50% align="centre">

<HR width=50% align="right">
noshade

<HR size=5 noshade>

<ISINDEX [prompt=text]>

Default: using the prompt attribute
<ISINDEX prompt="What?">
using the prompt attribute: <ISINDEX prompt="What?">

<li [type=...] [value=number]>

The parameters added to the <LI> tag are meant to allow more flexibility. Now it is possible to completely lose track of numbering and style within a list:

list item 1
list item 2

Use the extensions to <OL> and <UL> in preference to the extensions to <LI>.

<ol [type="1"|"a"|"A"|"i"|"I"] [start=number]>

type
<ol type=1> <li> <li><ol type=a> <li> <li><ol type=i> <li> <li><ol type=A> <li> <li><ol type=I> <li>I could go on </ol> </ol> </ol> </ol> </ol>
start
<ol start=5> <li> <li><ol start=9> <li> <li> <li>And so on </ol> </ol>

...


Text within NOBR can not be broken and ends up on a very very very loooooooooong line.


<ul [type="disc"|"circle"|"square"]>


<ul type=disc>

  <li><ul type=circle>
  
    <li><ul type=square>
    
      <li>I could go on
    
    </ul>
  
  </ul>

</ul>

A WBR tells netscape where a word can be broken if it needs to be. An example of its use is where a narrow band of text occurs between two pictures.

The text might contain long strings like this-is-a-long-string-with-lots-of-hyphens-in-it which just cant be broken very easily without screwing up the page appearance

by adding WBRs the problem is solved. this-is-a-long-string-with-lots-of-hyphens-in-it.

character codes

backgrounds


<BODY [BACKGROUND=image] 
[BGCOLOR=#rrggbb] 
[TEXT=#rrggbb] 
[LINK=#rrggbb]
[VLINK=#rrggbb]
[ALINK=#rrggbb] >

Document here

</BODY>

BACKGROUND: tiles the specified image onto the background
BGCOLOR: The colour to use for the background (if not an image)
TEXT: the colour of the normal text (normally #000000)
LINK: links prior to activation
ALINK: activated links
VLINK: visited links

Examples

dynamic documents and the art of pushing and pulling

I'm afraid the explanation is too esoteric for me to simplify (or understand) So you're going to have to look at the original netscape documentation for this

With the release of Java, The push pull mechanism of netscape will have to be dismissed into the domains of the obsolete.

tables

Examples
<TABLE [border=size]>...</TABLE>: This contains the other table tags.
<TR [rowspan] [align=alignment] [valign=alignment]>..</TR>: The current row in the <Table>
<TD [nowrap] [align=alignment] [valign=alignment]>..</TD>: A data cell in the current <TR>.
<TH [nowrap] [align=alignment] [valign=alignment]>..</TH>: This is a Header cell and is similar to the <TD> tag except that the default font is centred and bold.
<CAPTION [align=alignment]>..</CAPTION>: Captions can appear anywhere in a <Table> but can not be contained within <TR>, <TD> or <TH> tags.
Captions align to the top by default.

<MAP NAME="map_name">...</MAP>

This defines a client side image map.

first define your map and assign it with a name:

<MAP NAME=name >  <AREA SHAPE="RECT" HREF="url1" COORDS="x1,y1,x2,y2" TARGET="frame_name"> <AREA SHAPE="CIRCLE" HREF="url2" COORDS="origin_x,origin_y,x2,y2" TARGET="frame_name"> <AREA SHAPE="POLY" HREF="url3" COORDS="x1,y1,x2,y2,..." TARGET="frame_name"> </MAP>

The default url is normally set to be the current document. THe behaviour of the browser when overlapping areas are defined is not documented.

and then you can use that map

<IMG SRC="url" USEMAP="#name">