Javacript Functions

Is there any way I can make a javascript function go through all the images in a directory? Or through images which are listed?

I could use

HTML Code:

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var image = '1'

function ChangeBG1()
{
    image = image+1;

}

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So it goes threw files called 1,2,3,4,5 but once it reaches the end it won't go back to 1.

Thanks.

Edit: Its to change the background of a div when you click something :p

Moved by Agesilaus (Forum Moderator) from Design & Development: Please post in the correct forum next time. :)

Sorry to double post, i found a way around that, I just need one more thing.
I need it to send a URL into a form :l

The js is:

PHP Code:

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<script language="javascript">
var hi_list = [1];
function changeimg(act,a){
    switch (a){
        case 0: hi_list[act] = hi_list[act]+1;
        if(hi_list[act] > 10){hi_list[act] = 1;}
        break;
        case 1: hi_list[act] = hi_list[act]-1;
        if(hi_list[act] < 1){hi_list[act] = 10;}
        break;
    }
    n_src = 'http://habbcrazy.net/test/images/'+hi_list[0]+'.gif';
    window.document.images['habboimg'].src = n_src;
    form.urlpreview.value = 'http://habbcrazy.net/test/images/'+hi_list[0]+'.gif';

}    
</script> 


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I tried this one, but didnt work (The field ID is "urlpreview")

PHP Code:

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    form.urlpreview.value = 'http://habbcrazy.net/test/images/'+hi_list[0]+'.gif'; 


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