Proprietary Elements

Proprietary Elements *

Explanation

Proprietary elements do not work across browsers.

They belong to a single browser manufacturer.

Here are some examples.

Lists

Microsoft Internet Explorer
<basefont> color=color face=font face	Sets the color and/or font of the entire document when placed in the <head> or for subsequent text when placed in the flow of the body text
<bgsound>	Inserts an audio file that plays in the background
<body> bgproperties=value	Determines whether background image scrolls with the background
<body> leftmargin=n rightmargin=n	Sets the margin between the browser window and the contents of the page
<caption> valign=position	Sets vertical alignment of table caption
<comment>	Inserts a comment in the HTML source that does not display in the browser (same as <! -- and -- >)
<form> target=name	Specifies a target window or frame for the output of a form
<frameset> framespacing=n	Sets the amount of space between frames
<img> dynsrc=url controls loop=n start=action	Uses the image tag to place video or audio clips
<marquee>	Places scrolling marquee text on the page
<table> bordercolor=color bordercolordark=color bordercolorlight=color	Sets colors for 3-D table borders in the <table>, <td>, <th>, and <tr> tags
<table> frame=value	Controls the display of the outer borders of a table in the <table> tag

Microsoft Internet Explorer

Tag and Attributes

Description

color=color
face=font face

Sets the color and/or font of the entire document when placed in the <head> or for subsequent text when placed in the flow of the body text

Inserts an audio file that plays in the background

<body>

bgproperties=value

Determines whether background image scrolls with the background

<body>

leftmargin=n
rightmargin=n

Sets the margin between the browser window and the contents of the page

valign=position

Sets vertical alignment of table caption

Inserts a comment in the HTML source that does not display in the browser (same as <! -- and -- >)

<form>

target=name

Specifies a target window or frame for the output of a form

framespacing=n

Sets the amount of space between frames

<img>

dynsrc=url
controls
loop=n
start=action

Uses the image tag to place video or audio clips

Places scrolling marquee text on the page

<table>

bordercolor=color
bordercolordark=color
bordercolorlight=color

Sets colors for 3-D table borders in the <table>, <td>, <th>, and <tr> tags

<table>

frame=value

Controls the display of the outer borders of a table in the <table> tag


Tag	Description
Netscape Navigator
This one is included here as another example. It has been superseded by the standards-complaint Mozilla or Gecko browsers.
<blink>	Causes text to blink on and off
<ilayer>	Inline layer; allows you to offset content from its natural position on the page
<keygen>	Facilitates generation of key material and submission of the public key as part of an HTML form (for privacy and encryption)
<layer>	Creates layers so that elements can be placed on top of each other (useful with DHTML)
<multicol>	Produces a multicolumn format
<nolayer>	Alternative text for browsers that do not support <layer> and <ilayer>
<server>	Specifies a server-side JavaScript application
<spacer>	Holds a specified amount of empty space (used for alignment of elements on the page and to hold table cells open to specific widths)

* Credit

Adapted from Niederst, Jennifer, Appendix C, Web Design in a Nutshell, 2nd Edition (O'Reilly, 2001), available at http://www.oreilly.com/catalog/wdnut2/.

For more disallowed elements, see:

< Lesson Page

XHTML Strict Specs, Part 1