Load xml in Javascript doesnt work in firefox

[Hush]

Hi,

The following code works fine in IE7 but FF returns with an error:

Access denied to achieve the property Element.firstCh ild. In this
line:
nodes = xmlDoc.document Element.childNo des;

My code:

function CheckNick()
{
nick = document.getEle mentById("nick" );
nickName = nick.value;

if (window.ActiveX Object)
{
xmlDoc = new ActiveXObject(" Microsoft.XMLDO M");
xmlDoc.onreadys tatechange = function () {
if (xmlDoc.readySt ate == 4) handleXML()
};
xmlDoc.load("is NickAvailable.p hp?nick="+nickN ame+"&IEHACK="+ (new
Date()).getTime ());
}
else if (document.imple mentation &&
document.implem entation.create Document)
{
xmlDoc = document.implem entation.create Document("", "", null);
xmlDoc.onload = handleXML;
xmlDoc.load("is NickAvailable.p hp?nick="+nickN ame+"&IEHACK="+ (new
Date()).getTime ());
}

else
{
alert('Your browser can\'t handle this script');
return;
}

}
function handleXML()
{
nodes = xmlDoc.document Element.childNo des;
alert(nodes.ite m(0).text);
//
alert(xmlDoc.ge tElementsByTagN ame('nick').chi ldNodes.firstCh ild.nodeValue);
}
Regards

Hush

[Martin Honnen]

Hush wrote:

The following code works fine in IE7 but FF returns with an error:

Access denied to achieve the property Element.firstCh ild. In this
line:
nodes = xmlDoc.document Element.childNo des;

It is not likely that you get an error on 'firstChild' in an expression
that does not contain that name.

function handleXML()
{
nodes = xmlDoc.document Element.childNo des;
alert(nodes.ite m(0).text);
//
alert(xmlDoc.ge tElementsByTagN ame('nick').chi ldNodes.firstCh ild.nodeValue);

That expression does not make sense, getElementsByTa gName gives a
collection which you can index, and childNodes gives a collection which
you can index too.
I think you should show us the XML you load and describe the elements
you want to read out, then we can help coding the access to those elements.

--

Martin Honnen
http://JavaScript.FAQTs.com/

[Hush]

On 7 Aug., 14:41, Martin Honnen <mahotr...@yaho o.dewrote:

Hush wrote:

The following code works fine in IE7 but FF returns with an error:

Access denied to achieve the property Element.firstCh ild. In this
line:
*nodes = xmlDoc.document Element.childNo des;

It is not likely that you get an error on 'firstChild' in an expression
that does not contain that name.

Sorry, I typed it wrong. Its of course Access denied to achieve the
property Element.childNo des, and not firstNode.

That expression does not make sense, getElementsByTa gName gives a
collection which you can index, and childNodes gives a collection which
you can index too.
I think you should show us the XML you load and describe the elements
you want to read out, then we can help coding the access to those elements.

Ok. Actually I only want to extract 1 number (1 or 0) so I only need 1
value from the XML. My XML is as follows:
<?xml version="1.0" encoding="iso-8859-1"?>
<nick>
<isa>0</isa>
</nick>

I'm trying to get the value of the element <isa>

Hush

[Martin Honnen]

Hush wrote:

Ok. Actually I only want to extract 1 number (1 or 0) so I only need 1
value from the XML. My XML is as follows:
<?xml version="1.0" encoding="iso-8859-1"?>
<nick>
<isa>0</isa>
</nick>

I'm trying to get the value of the element <isa>

var isaElements = xmlDoc.getEleme ntsByTagName('i sa');
if (iseElements.le ngth 0)
{
var isa = isaElements[0];
var n = isa.firstChild. nodeValue;
}
else
{
// handle case that 'isa' element was not found
}

That assumes that the 'isa' element always has some text in it.


--

Martin Honnen
http://JavaScript.FAQTs.com/

[Hush]

>
* *var isaElements = xmlDoc.getEleme ntsByTagName('i sa');
* *if (iseElements.le ngth 0)
* *{
* * *var isa = isaElements[0];
* * *var n = isa.firstChild. nodeValue;
* *}
* *else
* *{
* * *// handle case that 'isa' element was not found
* *}

I'm stil getting the error for firstChild in this line:
var n = isa.firstChild. nodeValue;

I tested in IE. And it worked nicely...

[Martin Honnen]

Hush wrote:

I'm stil getting the error for firstChild in this line:
var n = isa.firstChild. nodeValue;

Can you post the exact error message? Your first post said "access
denied" which sounds more like a security exception. I am not sure why
you would get that, if you tried to load the XML from a different origin
then I would expect the load call to already throw an exception.
If you have a URL we can visit then post that too.

Does that problem occur with Firefox 3? Have you checked whether it also
occurs with Firefox 2?

--

Martin Honnen
http://JavaScript.FAQTs.com/

[Hush]

On 7 Aug., 18:14, Martin Honnen <mahotr...@yaho o.dewrote:

Hush wrote:

*I'm stil getting the error for firstChild in this line:
var n = isa.firstChild. nodeValue;

Can you post the exact error message? Your first post said "access
denied" which sounds more like a security exception. I am not sure why
you would get that, if you tried to load the XML from a different origin
then I would expect the load call to already throw an exception.
If you have a URL we can visit then post that too.

Does that problem occur with Firefox 3? Have you checked whether it also
occurs with Firefox 2?

--

* * * * Martin Honnen
* * * *http://JavaScript.FAQTs.com/

I translated the error from a danish version of firebug. I'm using
FF3, but when I come to think of it I had a similar error a while ago
with the same error. This was in an unchanged code, but after the
upgrade to FF3, so this could definately be the cause. I havent tested
in FF2. ( I will try that now)

URL:
http://www.sporturn.com/new/popuppages/new_profile.php

[Hush]

Does that problem occur with Firefox 3? Have you checked whether it also
occurs with Firefox 2?

It works in FF2. So the problem is in FF3 :|

Is there a fix??

[Martin Honnen]

Hush wrote:

>>Does that problem occur with Firefox 3? Have you checked whether it also
occurs with Firefox 2?

It works in FF2. So the problem is in FF3 :|

Oddly enough I have just tested with Mozilla/5.0 (Windows; U; Windows NT
5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1 and entered some
characters into the "nick" field and I don't get any error in the error
console, instead each time an alert dialog with '1' is displayed.

Is there a fix??

I am still not sure why you get that error and I can't reproduce it.
As a workaround you might want to try to load the XML with
XMLHttpRequest instead of xmlDoc.load(), perhaps that avoids the problem.

--

Martin Honnen
http://JavaScript.FAQTs.com/

[Thomas 'PointedEars' Lahn]

Hush wrote:

>>Does that problem occur with Firefox 3? Have you checked whether it also
occurs with Firefox 2?

It works in FF2. So the problem is in FF3 :|

True, but that does not necessarily mean that the problem *is* Fx 3.
For example, Firebug for Fx 3 is still beta.

Is there a fix??

For a start, you could try not to mix standards compliant and proprietary
features, which would be a good idea in any case.
PointedEars
--
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(This won't prevent people from viewing your source, but no one
will want to steal it.)
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