getAttribute ('id') Not Working

vivekian

Hi ,

In one of the javascript functions , i need to get the ids of the
elements. This function works in Internet Explorer :

var TabNames = ParentTab.childNodes ;

for ( i = 0 ; i < TabNames.length ; i++ )
{
var TabID = TabNames[i].getAttribute('id') ;
var TabIDSuffix = TabID.split (Splitter) ;

if ( TabIDSuffix[0].length != 0 )
{
if ( TabIDSuffix[0] == URLTab )
{
result = true ;
break ;
}
}

}
// TabNames is the array of divs which are enclosed in the parent div.

But in Firefox it gives an error saying :
Error: TabNames[i].getAttribute is not a function

Is there an alternate way to do this.

Dec 5 '06 #1

Subscribe Post Reply

21461

vivekian wrote:

In one of the javascript functions , i need to get the ids of the
elements. This function works in Internet Explorer :

var TabNames = ParentTab.childNodes ;

for ( i = 0 ; i < TabNames.length ; i++ )
{
var TabID = TabNames[i].getAttribute('id') ;
var TabIDSuffix = TabID.split (Splitter) ;

if ( TabIDSuffix[0].length != 0 )
{
if ( TabIDSuffix[0] == URLTab )
{
result = true ;
break ;
}
}

}
// TabNames is the array of divs which are enclosed in the parent div.

But in Firefox it gives an error saying :
Error: TabNames[i].getAttribute is not a function

You are hitting the phantom nodes problem on Gecko-based browsers
<http://en.wikipedia.org/wiki/Phantom_nodes>

You have to add extra check to sort out element nodes and parasite text
nodes from your pretty-print. See for instance
<http://developer.mozilla.org/en/docs/firstChild(skip on pathetic
arguments why phantom nodes are not a bug and see the samples
themselves).

You can also use anti-phantom pretty-print:

<body

><h1>Header</h1

><p>Content</p
<p>More content

....

but unless you have an automation script (mine is on Perl) that's a
boring doing.

Dec 5 '06 #2

Martin Honnen

vivekian wrote:

In one of the javascript functions , i need to get the ids of the
elements. This function works in Internet Explorer :

var TabNames = ParentTab.childNodes ;

for ( i = 0 ; i < TabNames.length ; i++ )

There could be a text node or comment node as a child which does not
have attribute so do a check for element nodes first e.g.

{

var childNode = TabNames[i];
if (childNode.nodeType === 1) {
// now you have an element and can access attributes of the element

var TabID = TabNames[i].getAttribute('id') ;

}

If that is HTML that you script then simply use
childNode.id
not
childNode.getAttribute('id')
--

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

Dec 5 '06 #3

Erwin Moller

vivekian wrote:

Hi ,

In one of the javascript functions , i need to get the ids of the
elements. This function works in Internet Explorer :

var TabNames = ParentTab.childNodes ;

for ( i = 0 ; i < TabNames.length ; i++ )
{
var TabID = TabNames[i].getAttribute('id') ;
var TabIDSuffix = TabID.split (Splitter) ;

if ( TabIDSuffix[0].length != 0 )
{
if ( TabIDSuffix[0] == URLTab )
{
result = true ;
break ;
}
}

}
// TabNames is the array of divs which are enclosed in the parent div.

But in Firefox it gives an error saying :
Error: TabNames[i].getAttribute is not a function

Is there an alternate way to do this.

Does TabNames[i].id return something usable?

Erwin Moller

Dec 5 '06 #4

JP. Baker

In article <11*********************@16g2000cwy.googlegroups.c om>,
vivekian <vi********@gmail.comwrote:

>In one of the javascript functions , i need to get the ids of the
elements. This function works in Internet Explorer :

var TabNames = ParentTab.childNodes ;

for ( i = 0 ; i < TabNames.length ; i++ )
{
var TabID = TabNames[i].getAttribute('id') ;
var TabIDSuffix = TabID.split (Splitter) ;

if ( TabIDSuffix[0].length != 0 )
{
if ( TabIDSuffix[0] == URLTab )
{
result = true ;
break ;
}
}

}
// TabNames is the array of divs which are enclosed in the parent div.

But in Firefox it gives an error saying :
Error: TabNames[i].getAttribute is not a function

You are almost certainly hitting the text nodes as well as the required
nodes - check with the DOM Inspector - you should probably check the
nodeType or use hasAttributes() before calling getAttributes.

--
John P Baker

Dec 5 '06 #5

ASM

vivekian a écrit :

In one of the javascript functions , i need to get the ids of the
elements. This function works in Internet Explorer :

Are your elements really have an id (and not only a name) ?
IE love too much to call a name an id and vice versa.

But in Firefox it gives an error saying :
Error: TabNames[i].getAttribute is not a function

Is there an alternate way to do this.

for ( i = 0 ; i < TabNames.length ; i++ )
{
if(TabNames[i] && TabNames[i].tagName=='DIV' && TabNames[i].id)
var TabID = TabNames[i].getAttribute('id') ;

Or try :

for ( i = 0 ; i < TabNames.length ; i++ )
{
if(TabNames[i] && TabNames[i].id)
var TabID = TabNames[i].id;

--
Stephane Moriaux et son (moins) vieux Mac déjà dépassé
Stephane Moriaux and his (less) old Mac already out of date

Dec 5 '06 #6

RobG

vivekian wrote:

Hi ,

In one of the javascript functions , i need to get the ids of the
elements. This function works in Internet Explorer :

var TabNames = ParentTab.childNodes ;

Others have given you some ideas, but always room for more: :-)

var TabNames = ParentTab.getElementsByTagName('div');

Now TabNames contains *only* div elements, not all the childNodes of
TabNames. Or you could use feature detection (see below).

>
for ( i = 0 ; i < TabNames.length ; i++ )
{
var TabID = TabNames[i].getAttribute('id') ;
var TabIDSuffix = TabID.split (Splitter) ;

How about testing for the id property rather than using getAttribute:

var TabID, TablDSuffix;
if ((TabID = TabNames[i].id) && (TabIDSuffix =
TabID.split (Splitter))){
/* Do stuff with TabIDSuffix */
}
--
Rob

Dec 5 '06 #7

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