NaN is happening because of an error in this line:

parseInt(div.className.substring(3));

It most likely means your className is different.

I just tested the code in Firefox on this markup and it works as it
should:

<div class="img1"></div>

What does your html and js look like?

On Mar 21, 7:21 am, Alexandru Dinulescu <alex.d.a...@gmail.com> wrote:
> Hello.
>
> I am getting a imgNaN when using this, can you tell me how i can make the
> array script work since that doesnt work either.
>
> -------------------
> Alexandru Dinulescu
> Web Developer
> (X)HTML/CSS Specialist
> Expert Guarantee Certified Developer
> XHTML:http://www.expertrating.com/transcript.asp?transcriptid=1879053
> CSS :http://www.expertrating.com/transcript.asp?transcriptid=1870619
> RentACoder 
> Profile:http://www.rentacoder.com/RentACoder/DotNet/SoftwareCoders/ShowBioInf...
>
> MainWebsite:http://alexd.adore.ro
>
> On Sat, Mar 21, 2009 at 4:13 AM, mkmanning <michaell...@gmail.com> wrote:
>
> > Another alternative (no array needed, goes from img1 to img5 and
> > starts over):
>
> > $(document).ready(function(){
> >        div = $('div.img1')[0], //get with whatever selector once
> >        swapDiv = setInterval(function(){
> >                n = parseInt(div.className.substring(3));
> >                div.className = 'img'+( n>4?1:n+1 );
> >        },5000);
> > });
>
> > If you want to stop it later, just call clearInterval('swapDiv');
> > It's probably a little more efficient :)
>
> > On Mar 20, 12:23 pm, Alexandru Dinulescu <alex.d.a...@gmail.com>
> > wrote:
> > > Hello.
>
> > > Can i call this function normally like
> > > function imageSwap(){
> > > function code goes in here
>
> > > }
>
> > > $(document).ready(imageSwap);
> > > ?
>
> > > And another question
> > > can i put in the array paramters and have variables declared at the top
> > > for ex is this correct?
>
> > > function imageSwap() {
> > > var img1 = classImg1
> > > var img2 = classImg2
> > > var img3 = classImg3
>
> > > var imgArray = [ "img1" , "img2", "img3"];
>
> > > function swap(i){
> > >    if(imgArray.length > i){
> > >        $('.' + imgArray[i]).removeClass(
>
> > > > imgArray[i]).addClass(imgArray[i+1]);
> > > >    }else{
> > > >        return;
> > > >    }
> > > > setTimeout("swap("+(i+1)+")", 5000);
> > > > }
>
> > > > // Call the function
> > > > swap(0);
>
> > > }
>
> > > $(document).ready(imageSwap);
> > > -------------------
> > > Alexandru Dinulescu
> > > Web Developer
> > > (X)HTML/CSS Specialist
> > > Expert Guarantee Certified Developer
> > > XHTML:http://www.expertrating.com/transcript.asp?transcriptid=1879053
> > > CSS :http://www.expertrating.com/transcript.asp?transcriptid=1870619
> > > RentACoder Profile:
> >http://www.rentacoder.com/RentACoder/DotNet/SoftwareCoders/ShowBioInf...
>
> > > MainWebsite:http://alexd.adore.ro
>
> > > On Fri, Mar 20, 2009 at 2:39 PM, jQuery Lover <ilovejqu...@gmail.com>
> > wrote:
>
> > > > The code is not perfect:
>
> > > > var imgArray = [ "img1" , "img2", "img3"];
>
> > > > function swap(i){
> > > >    if(imgArray.length > i){
> > > >        $('.' +
> > > > imgArray[i]).removeClass(imgArray[i]).addClass(imgArray[i+1]);
> > > >    }else{
> > > >        return;
> > > >    }
> > > > setTimeout("swap("+(i+1)+")", 5000);
> > > > }
>
> > > > // Call the function
> > > > swap(0);
>
> > > > ----
> > > > Read jQuery HowTo Resource  -  http://jquery-howto.blogspot.com
>
> > > > On Fri, Mar 20, 2009 at 5:15 PM, Alexandru Dinulescu
> > > > <alex.d.a...@gmail.com> wrote:
> > > > > Hello.
>
> > > > > I have a huge question. I need something that rotates classes each 5
> > > > seconds
> > > > > for ex
>
> > > > > I have a <div class="img1"> </div>. I want each 5 seconds the class
> > to be
> > > > > changed from img1 to img2, and so on so at the start an array should
> > be
> > > > > placed like
> > > > > imgArray = [ "img1" , "img2", "img3",  etc ]
>
> > > > > I need css classes changed not a plain image since  the image is a
> > > > > background image and i have text on it.
>
> > > > > I did look over google but i couldnt find any help regarding this
> > matter.
>
> > > > > Thank you
>
> > > > > -------------------
> > > > > Alexandru Dinulescu
> > > > > Web Developer
> > > > > (X)HTML/CSS Specialist
> > > > > Expert Guarantee Certified Developer
> > > > > XHTML:
> >http://www.expertrating.com/transcript.asp?transcriptid=1879053
> > > > > CSS :http://www.expertrating.com/transcript.asp?transcriptid=1870619
> > > > > RentACoder Profile:
>
> > > >http://www.rentacoder.com/RentACoder/DotNet/SoftwareCoders/ShowBioInf.
> > ..
>
> > > > > MainWebsite:http://alexd.adore.ro

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