Proprietary Tags
Contents:
Microsoft Internet Explorer Proprietary Tags
Netscape Navigator Proprietary Tags
Although the vast majority of tags work for both major browsers, Netscape and Microsoft have developed sets of proprietary tags that work only in their respective browsers to gain an edge over the competition. Fortunately, this practice has come to an end (or at least slowed down) now that the browser companies have vowed to comply with standards, but we are still left with a legacy of tags that only work on one browser or another.
Dealing with browser differences is the major cause of headaches for web developers. The tables in this appendix list the available HTML tags that are still supported only in either Netscape Navigator or Internet Explorer.
Microsoft Internet Explorer Proprietary Tags
The following tags and attributes are supported only by Internet Explorer:
| HTML tag or attribute | Description |
|---|---|
<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 |