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update the class of a div

Hello,
I'm starting in rails and ajax. So i've a javascript question:
someone could help me to update the class of a div?

Regards.

Mar 14 '07 #1
8 11833
On 14 Mar, 00:35, "Jean-Sébastien" <jeansebastien....@gmail.com>
wrote:
Hello,
I'm starting in rails and ajax. So i've a javascript question:
someone could help me to update the class of a div?

Regards.
<html><body>

<div id="div_id"></div>
<style type="text/css">
..wow
{
border: 2px dashes red;
}
</style>
<script type="text/javascript>
var d = document.getElementById('div_id');
d.className += ' wow';
</script>
</body>

It hasn't anything to do with rails or ajax though, for that you will
use the rails helper scriptaculous.

Mar 14 '07 #2
On Mar 13, 7:35 pm, "Jean-Sébastien" <jeansebastien....@gmail.com>
wrote:
Hello,
I'm starting in rails and ajax. So i've a javascript question:
someone could help me to update the class of a div?
document.getElementById("myDiv").className = "newClass_name";
>
Regards.

Mar 14 '07 #3
"Jean-Sébastien" <je***************@gmail.comwrote in message
news:11**********************@n76g2000hsh.googlegr oups.com...
Hello,
I'm starting in rails and ajax. So i've a javascript question:
someone could help me to update the class of a div?
You use the className property of the element's instance. For example:

..c1 { background-color: purple; }
..c2 { color: red; }

<div id="d1">...</div>

document.getElementById('d1').className = 'c1';

Do not forget though, that the className property *replaces* it's value when written to.
Therefore if you would like to stack classes, you would need to:

document.getElementById('d1').className = 'c1';
document.getElementById('d1').className += ' c2';

Notice the plus and the space in the string literal.

-Lost
Mar 14 '07 #4
On Mar 14, 11:46 am, "shimmyshack" <matt.fa...@gmail.comwrote:
On 14 Mar, 00:35, "Jean-Sébastien" <jeansebastien....@gmail.com>
wrote:Hello,
I'm starting in rails and ajax. So i've a javascript question:
someone could help me to update the class of a div?
Regards.

<html><body>

<div id="div_id"></div>
<style type="text/css">
.wow
{
border: 2px dashes red;}

</style>
<script type="text/javascript>
var d = document.getElementById('div_id');
d.className += ' wow';
</script>
</body>

It hasn't anything to do with rails or ajax though, for that you will
use the rails helper scriptaculous.
Not Scriptaculous, Prototype.js's addClassName and removeClassName
methods:

$(id).addClassName('blah');
However, other frameworks can be used with Rails, e.g. Fork's addClass
and removeClass:

<URL: http://www.forkjavascript.org/dom/docs >
--
Rob

Mar 14 '07 #5
"RobG" <rg***@iinet.net.auwrote in message
news:11**********************@n59g2000hsh.googlegr oups.com...
>It hasn't anything to do with rails or ajax though, for that you will
use the rails helper scriptaculous.
Not Scriptaculous, Prototype.js's addClassName and removeClassName
methods:

$(id).addClassName('blah');

However, other frameworks can be used with Rails, e.g. Fork's addClass
and removeClass:
<URL: http://www.forkjavascript.org/dom/docs >
jQuery has a similar method.

$('p[@id=p1]').addClass('className');

Will take a P tag with an attribute ID of p1 and add the class named className.

$('p.className').addClass('className2');

Which takes a P tag, with a class of className, and adds className2, to it.

Not knocking Michaux either!

-Lost
Mar 14 '07 #6
On Mar 14, 12:25 pm, "-Lost" <missed-s...@comcast.netwrote:
"RobG" <r...@iinet.net.auwrote in message

news:11**********************@n59g2000hsh.googlegr oups.com...
It hasn't anything to do with rails or ajax though, for that you will
use the rails helper scriptaculous.
Not Scriptaculous, Prototype.js's addClassName and removeClassName
methods:
$(id).addClassName('blah');
However, other frameworks can be used with Rails, e.g. Fork's addClass
and removeClass:
<URL:http://www.forkjavascript.org/dom/docs>

jQuery has a similar method.

$('p[@id=p1]').addClass('className');

Will take a P tag with an attribute ID of p1 and add the class named className.

$('p.className').addClass('className2');

Which takes a P tag, with a class of className, and adds className2, to it.
Can jQuery be used with Rails a la Prototype.js?

--
Rob

Mar 14 '07 #7
On 14 mar, 03:47, "RobG" <r...@iinet.net.auwrote:
On Mar 14, 12:25 pm, "-Lost" <missed-s...@comcast.netwrote:
"RobG" <r...@iinet.net.auwrote in message
news:11**********************@n59g2000hsh.googlegr oups.com...
>It hasn't anything to do with rails or ajax though, for that you will
>use the rails helper scriptaculous.
Not Scriptaculous, Prototype.js's addClassName and removeClassName
methods:
$(id).addClassName('blah');
However, other frameworks can be used with Rails, e.g. Fork's addClass
and removeClass:
<URL:http://www.forkjavascript.org/dom/docs>
jQuery has a similar method.
$('p[@id=p1]').addClass('className');
Will take a P tag with an attribute ID of p1 and add the class named className.
$('p.className').addClass('className2');
Which takes a P tag, with a class of className, and adds className2, to it.

Can jQuery be used with Rails a la Prototype.js?

--
Rob
Thanks to all for your answers. It is really helpfull!
RobG, even if prototype and scriptaculous are in the default package
you can use other ajax library instead of this one. But i've never
done it. Maybe you should read this post :
http://yehudakatz.com/2007/01/31/usi...-rails-part-i/
and thanx again.

Mar 14 '07 #8
"RobG" <rg***@iinet.net.auwrote in message
news:11*********************@n59g2000hsh.googlegro ups.com...
On Mar 14, 12:25 pm, "-Lost" <missed-s...@comcast.netwrote:
>"RobG" <r...@iinet.net.auwrote in message

news:11**********************@n59g2000hsh.googleg roups.com...
>It hasn't anything to do with rails or ajax though, for that you will
use the rails helper scriptaculous.
Not Scriptaculous, Prototype.js's addClassName and removeClassName
methods:
$(id).addClassName('blah');
However, other frameworks can be used with Rails, e.g. Fork's addClass
and removeClass:
<URL:http://www.forkjavascript.org/dom/docs>

jQuery has a similar method.

$('p[@id=p1]').addClass('className');

Will take a P tag with an attribute ID of p1 and add the class named className.

$('p.className').addClass('className2');

Which takes a P tag, with a class of className, and adds className2, to it.

Can jQuery be used with Rails a la Prototype.js?
Yes, I believe so.

http://docs.jquery.com/Core#.24.noConflict.28.29

Illustrates jQuery playing nicely with other such libraries, namely Prototype.

Also, JQuails looks promising. Did not find too much information on it though, so cannot
be sure.

-Lost
Mar 14 '07 #9

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