[jQuery] Banner Slide Show

Hi group,

I am new to jQuery. I see a lot of examples out there that show you
how to make a banner slide show. They work great, but how do I read
images from a specific folder?

The way I have my images structured for the banner is by season. So,
I have a group of photos in a folder labeled Winter and one for
Spring...etc.

So, how do I get the current season (using jQuery) and all images in a
given folder (using jQuery). This would replace the HTML div tag
section below.

Here is an example script for just the slide show:
http://jonraasch.com/blog/a-simple-jquery-slideshow

HTML:
<div id="slideshow">
<img src="img/img1.jpg" alt="" class="active" />
<img src="img/img2.jpg" alt="" />
<img src="img/img3.jpg" alt="" />
</div>

STYLE:
#slideshow {
position:relative;
height:350px;
}

#slideshow IMG {
position:absolute;
top:0;
left:0;
z-index:8;
}

#slideshow IMG.active {
z-index:10;
}

#slideshow IMG.last-active {
z-index:9;
}

jQuery:
function slideSwitch() {
var $active = $('#slideshow IMG.active');

if ( $active.length == 0 ) $active = $('#slideshow IMG:last');

// use this to pull the images in the order they appear in the
markup
var $next = $active.next().length ? $active.next()
: $('#slideshow IMG:first');

// uncomment the 3 lines below to pull the images in random order

// var $sibs = $active.siblings();
// var rndNum = Math.floor(Math.random() * $sibs.length );
// var $next = $( $sibs[ rndNum ] );

$active.addClass('last-active');

$next.css({opacity: 0.0})
.addClass('active')
.animate({opacity: 1.0}, 1000, function() {
$active.removeClass('active last-active');
});
}

$(function() {
setInterval( "slideSwitch()", 5000 );
});