Juri Shutenko

Juri,

> MS Internet Explorer supports the stylesheets collection,
> but your test shown that is wrong, so check, please, this part
> of your excellent article.

When I try the test in IE (windows or mac), it says "Your browser does not
support DOM 2 Style Sheets". That is correct. IE supports the
document.styleSheets collection, but it does not support W3C DOM 2
StyleSheets. It has its own model that is incompatible with W3C DOM 2.

In browsers that do not support either model - such as Opera 8 or below - it
says "Your browser does not support document.styleSheets". I do not get that
message in IE, so I do not see anything wrong with my script.


Mark 'Tarquin' Wilton-Jones - author of http://www.howtocreate.co.uk/

Juri,

> "if( !document.styleSheets ) { showNoSSWarning(); return; }"
>
> Or I wrong?

You misunderstand. That line says "If the browser does not support
document.stylesheets, show the warning that says it does not support
document.stylesheets".

That is line that is triggering in Opera 8. In IE, it is this line that
triggers:

if( !oStyleSheet.insertRule || !oStyleSheet.cssRules ||
!oStyleSheet.cssRules.length ) { showNoDOMSSWarning(); return; }

The checks are done in stages to catch all the possible ways that a browser
can fail to support DOM 2 StyleSheets. Opera 8 and browsers like it are
stopped by the first check, IE is stopped at the last one. They have
different warnings depending on what fails;
showNoSSWarning
showNoSSFoundWarning
showNoDemoWarning
showNoDOMSSWarning

In a real script, you would obviously not need to have so many separate
checks, I only use them as part of the demonstration so you can see how a
browser has failed when it fails.