jQuery Showcase. Fade instead of Rotate

Hi all,

I’ve been working with a nice little script found on Soh Tanaka’s blog, but I’m having a bit of trouble modifying it.

I’m looking to change the rotation to a fade, and it hasn’t been going well for me.
Any ideas?
Thanks in advance!

$(document).ready(function() {
	//Set Default State of each portfolio piece
	$(".wonderBar a:first").addClass("active");
	//Get size of images, how many there are, then determin the size of the image reel.
	var imageWidth = $("#indexTop .left").width();
	var imageSum = $(".slideCase img").size();
	var imageReelWidth = imageWidth * imageSum;
	//Adjust the image reel to its new size
	$(".slideCase").css({'width' : imageReelWidth});
	//wonderBar + Slider Function
	rotate = function(){	
		var triggerID = $active.attr("rel") - 1; //Get number of times to slide
		var slideCasePosition = triggerID * imageWidth; //Determines the distance the image reel needs to slide
		$(".wonderBar a").removeClass('active'); //Remove all active class
		$active.addClass('active'); //Add active class (the $active is declared in the rotateSwitch function)
		//Slider Animation
			left: -slideCasePosition
		}, 700 );
	//Rotation + Timing Event
	rotateSwitch = function(){		
		play = setInterval(function(){ //Set timer - this will repeat itself every 3 seconds
			$active = $('.wonderBar a.active').next();
			if ( $active.length === 0) { //If wonderBar reaches the end...
				$active = $('.wonderBar a:first'); //go back to first
			rotate(); //Trigger the wonderBar and slider function
		}, 7000); //Timer speed in milliseconds (3 seconds)
	rotateSwitch(); //Run function on launch
	//On Hover
	$(".slideCase a").hover(function() {
		clearInterval(play); //Stop the rotation
	}, function() {
		rotateSwitch(); //Resume rotation
	//On Click
	$(".wonderBar a").click(function() {	
		$active = $(this); //Activate the clicked wonderBar
		//Reset Timer
		clearInterval(play); //Stop the rotation
		rotate(); //Trigger rotation immediately
		rotateSwitch(); // Resume rotation
		return false; //Prevent browser jump to link anchor