please dont rip this site

Since its incarnation, browser compatibility has been an issue with JavaScript. This listing attempts to cover some of the bugs, missing features, and new features that JavaScript has endured since version 1.0.

You'll find two sections here: Features and Bugs. The first section documents browsers' support for most of JavaScript's features; the second section documents the bugs, inconsistencies, or oddities of JavaScript features on a browser by browser basis.

JavaScript Features
  Nav 2 Nav 3 Nav 4 IE 3 IE 4
access to java
No Yes Yes Yes1 Yes1
image maps
No Yes Yes No Yes
create arrays
No Yes Yes Yes Yes
control css
No No Yes2 No Yes
browser's cookie
Yes Yes Yes Yes* Yes
Yes Yes Yes Yes Yes
xtra event info
No No Yes3 No Yes3
external scripts
with src attr
No Yes Yes No4 Yes
general forms
Yes5 Yes Yes Yes*,5 Yes
control frames
Yes Yes Yes Yes Yes
page history
Yes Yes Yes Yes* Yes
control images
No Yes Yes No9 Yes
detect java
No Yes Yes No Yes
control links
Yes Yes Yes Yes Yes
control location
Yes6 Yes Yes Yes*, 6 Yes
math operations
Yes Yes Yes Yes Yes
browser info
Yes Yes Yes Yes Yes
mime types
No Yes Yes No No
control select
menu options
No Yes Yes No No
create strings
Yes Yes Yes Yes Yes
control window
Yes7,8 Yes8 Yes Yes*,7,8 Yes8
write html
Yes* Yes* Yes Yes Yes

JavaScript Bugs
  Bug Description
IE 4
Still in "preview release"
IE 3
Though IE 3 allows JavaScript access to cookies, the feature is disabled offline. So to work with cookies and JavaScript in IE 3, put your files on a server first.

Form's Action
You cannot change ACTION property of a form in IE 3 through JavaScript.

Form's Target
You cannot change TARGET property of a form in IE 3 through JavaScript.

While Navigator 2 bases the path of a frame's location on the URL of the frame that contains the controlling script, IE 3 bases the path on the URL of the target frame. For example, in Navigator 2, parent.B.location = "index.html" in frame A will result in frame B loading "index.html" in frame A's directory. Doing the same in IE 3 results in frame B loading "index.html" in frame B's directory.

There are a few oddities with the location property in IE 3.0. First, using the javascript: protocol to go to a URL with location will result in nothing; the location of the window will not change. This is fixed in IE 3.01. Second, sometimes location cannot be accessed properly, so location.href should be used at all times.

If the user gets to a page by following a link, the page's document.referrer property will return the url of the page that linked to it. In IE 3, the current page is always returned.

IE 3 has a few bugs dealing with windows. When you open a window using the open() method, the first parameter (for the url of the new window's document) will be ignored. Because of this, you must assign the location afterwards. Another bug deals with the opener property. When you open a new window, the new window is given a property, opener, which points to the window that opened it. There is no opener propery in IE 3.0. Both of these problems are fixed in IE 3.01.

Nav 4
There are a few problems with Navigator 4's CSS implementation (in relation to JavaScript). First, when you attempt to write to the DIV tags that surround an absolutetly positioned element, you will not recieve an error, but the content of the element will be cleared. Second, in complex layering situations the hidden and visible values for the visibility property will not work, and you will have to revert to the LAYER tag's hide and show values.
Nav 3
Navigator 3 has problems displaying JavaScript generated HTML (made with document.write()) inside tables. If you create a nested table (a table within a table) and try to put JavaScript generated HTML within it, either your code will be displayed or nothing will be displayed. Second, if you put certain JavaScript generated form elements within tables and then resize the window, the code will be displayed on the page and the table will "splurge" its contents.

*implementation buggy or incomplete, see bugs table
1access to ActiveX too, but no java api calls
2Nav only allows pre-display control, except with positioning
3the event model is improved, but it's different in IE and Nav
4external scripts supported in IE 3.01, but not 3.0
5no support for reset()
6no support for replace()
7no support for scroll(), focus(), blur()
8no support for moveTo(), moveBy(), resizeTo(), resizeBy()
9IE 3 for the Mac supports the image object


See also:

file: /Techref/language/html/browser.htm, 15KB, , updated: 2005/8/17 21:52, local time: 2017/1/19 11:45,

 ©2017 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE! / 

<A HREF=""> - Your home for JavaScript and Dynamic HTML on the Web.</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.

Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

  PICList 2017 contributors:
o List host: MIT, Site host, Top posters @20170119 Van Horn, David, RussellMc, David Duffy (AVD), IVP, speff, Justin Richards, Sean Breheny, alan.b.pearce, Brent Brown, Bob Blick,
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.

Welcome to!