Layers and Netscape 4.x

PsychoCrow

Hello everybody,
I looked for my problem googling, but I found always similar answers
about layer visualization.
I expose my problem, I have tre layers:

LAYER1
LAYER2
LAYER3

and I need to show/hide the layer I want, but in the way that the
layers below move them upper in the void position.
Es:

LAYER1
LAYER3

No problem with Explorer and Mozilla, using the "display" style setting
it on "block" and "none", I obtain the effect I want.
The real problem is about Netscape 4.x compatibility, I found a script
the simulate the "block" effect, but it's too complex to integrate it
in my application.
But I noticed one thing using the following HTML:

<BODY>
<DIV Name="id1" ID="id1" style="display: show">
LAYER1<BR>
</DIV>
<DIV Name="id2" ID="id2" style="display: show">
LAYER2<BR>
</DIV>
<DIV Name="id3" ID="id3" style="display: show">
LAYER3<BR>
</DIV>
</BODY>

I this way all the three browsers display the layers, but if I
replace "show" with "none", LAYER2 disappears leaving its position to
LAYER3, and it works with Netscape 4.x too!
Actually I'm trying to obtain the same effect using Javascript, but I
still didn't find any solution.
I succeeded to get the reference of the "id2" object with
document.ids.id 2, but using:

eval('document. ids.' + element + '.display=none' );

it doesn't work, the Javascript console displays "none is not defined.".
Why style="display: none" works and document.ids.id 2.display=none
doesn't work?
Thanks in advance for any suggestion! :o)
Bye,

PC

Inviato da www.mynewsgate.net

Jul 23 '05 #1

Subscribe Reply

1447

Martin Honnen

PsychoCrow wrote:

No problem with Explorer and Mozilla, using the "display" style setting
it on "block" and "none", I obtain the effect I want.
The real problem is about Netscape 4.x compatibility, I found a script
the simulate the "block" effect, but it's too complex to integrate it
in my application.

But you will need such a script, Netscape 4's layout machine like Opera
6's layout machine doesn't allow for a dynamic reflow caused by script
changing the CSS display property so if you need the effect you need to
write or use a script that not only hides your layers but also moves
them up and down as necessary to fill layout space.
--

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

Jul 23 '05 #2

Lee

PsychoCrow said:

But I noticed one thing using the following HTML:

<BODY>
<DIV Name="id1" ID="id1" style="display: show">
LAYER1<BR>
</DIV>
<DIV Name="id2" ID="id2" style="display: show">
LAYER2<BR>
</DIV>
<DIV Name="id3" ID="id3" style="display: show">
LAYER3<BR>
</DIV>
</BODY>

I this way all the three browsers display the layers, but if I
replace "show" with "none", LAYER2 disappears leaving its position to
LAYER3, and it works with Netscape 4.x too!
Actually I'm trying to obtain the same effect using Javascript, but I
still didn't find any solution.
I succeeded to get the reference of the "id2" object with
document.ids.i d2, but using:

eval('document .ids.' + element + '.display=none' );

it doesn't work, the Javascript console displays "none is not defined.".
Why style="display: none" works and document.ids.id 2.display=none
doesn't work?

That works as the page is being rendered, but changing the
value of the display style attribute won't work in 4.x after
the page has been displayed.

The error you're getting is because "none" needs to be in
quotes.

You shouldn't use eval(), anyway. The correct syntax would
be:
document.ids[element].display="none" ;

Again, though, it won't work after the page has been rendered.

Jul 23 '05 #3

Lasse Reichstein Nielsen

"PsychoCrow " <87*********@my newsgate.net> writes:

I succeeded to get the reference of the "id2" object with
document.ids.id 2, but using:
Surpricing. What is "ids"?

I would suggest using
document.layers['id2']
in Netscape 4.
eval('document. ids.' + element + '.display=none' );
Never use eval to access properties. You should probably never use
eval at all.

This can be better written as:
document.ids[element].display = none;
That also makes the error easier to spot ...
it doesn't work, the Javascript console displays "none is not defined.".
.... that "none" should be a string, so, all in all, try:

document.layers[element].display = "none";
Why style="display: none" works and document.ids.id 2.display=none
doesn't work?

Because "none" is not a variable, as the error says, and should be a string.

/L
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleD OM.html>
'Faith without judgement merely degrades the spirit divine.'

Jul 23 '05 #4

Lee

PsychoCrow said:

Hello everybody,
I looked for my problem googling, but I found always similar answers
about layer visualization.
I expose my problem, I have tre layers:

LAYER1
LAYER2
LAYER3

and I need to show/hide the layer I want, but in the way that the
layers below move them upper in the void position.
Es:

LAYER1
LAYER3

No problem with Explorer and Mozilla, using the "display" style setting
it on "block" and "none", I obtain the effect I want.

It is possible to accomplish this effect in NN4.x, but how to do
it depends on what the content is and whether or not it's worth
the effort of maintaining a completely separate page for one old
browser.

You can't split a form across layers in NN4, but you can rewrite
the entire content of the document when you want to show or hide
some part of the content.

Jul 23 '05 #5

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