Simon wrote:
[color=blue]
> I have recently set up a server certificate on a web site.
> Under certain conditions I need to change the color of a html span
> element.
> I do this using the following javascript function called from the
> onreset attribute of the form element.
>
> function removeWarningMsg()
> {
> if (isIE) {
> document.all.Warning.style.color = "<%=BACKGROUND_COLOUR%>";
> }
> return true;
> }
> This was working perfectly fine until I applied the server certificate
> to the website.
> Now when executing this line of code the following error occurs:
> Error: 'document.all.warning.style' is null or not an object.
> I am fairly new to both Javascript and SSL so if anyone could throw
> any light on to what the issue may be it would be greatly appreciated.
> regards Simon[/color]
View the source, is the page still producing a <span id="Warning">? If so, are
you using document.all.Warning... or document.all.warning... (the error you
pasted seems to imply the latter). HTML element ids are case-sensitive, so
that's the first thing to check.
Lastly, browser detection isn't a very good way to approach this, you're better
off using feature detection, and you can actually support Netscape 4, IE and
Netscape 7 all on a single page by choosing an alternative to changing the color
to the background color:
function removeWarningMsg() {
var div;
if (document.getElementById) { // IE5.5+, Opera 7, Mozilla
div = document.getElementById('Warning').style;
} else if (document.layers) { // NS4
div = document.layers['Warning'];
} else if (document.all) { // IE < 5.5
div = document.all('Warning');
}
if (div) {
div.visibility = 'hidden';
}
return true;
}
<span style="position:relative;" id="Warning">The warning</span>
"position:relative" is needed so the <span> shows up in the document.layers
collection in Netscape 4.
The comments are a comprehensive list of browsers that support each
method/collection, just an idea to show you what you might need to support the
browsers in your environment (for example, if you do not need to support IE <
5.5, I'd strongly recommend you use document.getElementById() over document.all.
--
| Grant Wagner <gwagner@agricoreunited.com>
* Client-side Javascript and Netscape 4 DOM Reference available at:
*
http://devedge.netscape.com/library/...ce/frames.html
* Internet Explorer DOM Reference available at:
*
http://msdn.microsoft.com/workshop/a...ence_entry.asp
* Netscape 6/7 DOM Reference available at:
*
http://www.mozilla.org/docs/dom/domref/
* Tips for upgrading JavaScript for Netscape 7 / Mozilla
*
http://www.mozilla.org/docs/web-deve...upgrade_2.html 
