Javascript run-time error when using a server certificate

[Simon]

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 removeWarningMs g()
{
if (isIE) {
document.all.Wa rning.style.col or = "<%=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.w arning.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

[Grant Wagner]

Re: Javascript run-time error when using a server certificate

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 removeWarningMs g()
> {
> if (isIE) {
> document.all.Wa rning.style.col or = "<%=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.w arning.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.Wa rning... or document.all.wa rning... (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 removeWarningMs g() {
var div;
if (document.getEl ementById) { // IE5.5+, Opera 7, Mozilla
div = document.getEle mentById('Warni ng').style;
} else if (document.layer s) { // NS4
div = document.layers['Warning'];
} else if (document.all) { // IE < 5.5
div = document.all('W arning');
}
if (div) {
div.visibility = 'hidden';
}
return true;
}

<span style="position :relative;" id="Warning">Th e warning</span>

"position:relat ive" 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.getEle mentById() over document.all.

--
| Grant Wagner <gwagner@agrico reunited.com>

* Client-side Javascript and Netscape 4 DOM Reference available at:
*

http://devedge.netscape.com/library/manuals/2000/javascript/1.3/reference/frames.html

* Internet Explorer DOM Reference available at:
*

http://msdn.microsoft.com/workshop/author/dhtml/reference/dhtml_reference_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

[Simon]

Re: Javascript run-time error when using a server certificate

Thanks for your reply Grant.
I can confirm that the span ID Warning is capitalised, so that
unfortunatley doesn't appear to be the problem.
Thanks for the advice on feature detection though, I will be giving that
a try.
Cheers Simon


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