HTML Extensions Summary

This list summarizes the extensions Netscape has made to HTML.

The elements shown here are in all capital letters; the attributes are indicated by initial capital letters.

HTML structure and comment elements

Netscape added backgrounds and colors to the BODY element which became part of the HTML 3.2 specifications.

Text: this attribute specifies the color of the document's text.

Link: this attribute specifies the color of the document's hotspots.

VLink: this attribute specifies the color of visited links.

ALink: this attribute specifies the color of the active link (the color it appears while the user is selecting it).

The HEAD and Related Elements

Netscape adds:

ISINDEX attribute Prompt to specify the message a user sees for a searchable index. Example: Prompt="Enter keyword(s)."

The BODY and Related Elements

The HR attributes added by Netscape were incorporated into the HTML 3.2 specification.

Unordered List LI attribute added: Type="disc|circle|square"

Type="disc"
Type="circle"
Type="square"

Ordered list LI attribute added: Type="A|a|I|i|1": A = capital letters; a = small letters; I = capital roman numerals; 1 = numbers (default)

Type="A"
Type="a"
Type="I"
Type="i"
Type="1"

Order List LI attribute added: Value="number"; Type="A|1"

Value: changes the displayed value for the list item
changes the displayed value to J

IMG: attributes added:

Align="left|right|top|texttop|middle|absmiddle|baseline|bottom|absbottom" Examples:
left aligned image
right aligned image
top text aligned image
middle text aligned image
bottom text aligned image
BR: attribute added:
- Clear="left|right|all": used in conjunction with image placement (see examples above) to flush text to clear the left or right (or both) margins
NOBR: (NO BReak). All text placed between the start and end of the NOBR element will not have line breaks inserted.
WBR: (Word BReak) Within a NOBR element, you can define where a line break should be made. Outside of the NOBR element, WBR is a hint, (use BR to force a linebreak).
FONT element with Size and Color attribute was added to the HTML 3.2 specification.
BASEFONT SIZE: changes the current base font size (default of 3 to another size in the range 1-7.
<BASEFONT SIZE="1"> </BASEFONT>
<BASEFONT SIZE="2"> </BASEFONT>
<BASEFONT SIZE="3"> </BASEFONT>
<BASEFONT SIZE="4"> </BASEFONT>
<BASEFONT SIZE="5"> </BASEFONT>
<BASEFONT SIZE="6"> </BASEFONT>
<BASEFONT SIZE="7"> </BASEFONT>
Font accumulations of attributes:
Italic font can accumulate typewriter and bold
Compare that to: italic, typewriter, and bold.
BLINK: creates blinking text
TABLE: extensions over Level 3's table attributes.
TAB: used to control horizontal positioning. Attribute "Id" to define a tabstop; attribute "To" to move to a tabstop:
```
This is the stop <TAB Id=T1> where the tab <BR>
<TAB To=T1>will move the text.
        
```
rendered in a Level 3 browser as:
```
This is the stop where the tab
                 will move the text.
        
```
Your browser renders this as:
This is the stop where the tab
will move the text.
Frames

References

John December (john@december.com) / 3 Jun 1996