How can I change the animation in this slider.js

I have been asked to change the animation in this slider.js from a sliding effect to a fading effect. I have no idea how to do this ? Please help. The code is listed below and also listed [URL=”http://codeviewer.org/view/code:220f”]here[/URL]. Thanks!

$(document).ready(function() {
//Show the paging and activate its first link
$(“.paging”).show();
$(“.paging a:first”).addClass(“active”);

//Get size of the image, how many images there are, then determin the size of the image reel.
var imageWidth = $(“.window”).width();
var imageSum = $(“.image_reel img”).size();
var imageReelWidth = imageWidth * imageSum;

//Adjust the image reel to its new size

$(“.image_reel”).css({‘width’ : imageReelWidth});

//Paging and Slider Function
rotate = function(){
var triggerID = $active.attr(“rel”) – 1; //Get number of times to slide
var image_reelPosition = triggerID * imageWidth; //Determines the distance the image reel needs to slide

$(“.paging a”).removeClass(‘active’); //Remove all active class
$active.addClass(‘active’); //Add active class (the $active is declared in the rotateSwitch function)

//Slider Animation
$(“.image_reel”).animate({
left: -image_reelPosition
}, 500 );

};

//Rotation and Timing Event
rotateSwitch = function(){
play = setInterval(function(){ //Set timer – this will repeat itself every 7 seconds
$active = $(‘.paging a.active’).next(); //Move to the next paging
if ( $active.length === 0) { //If paging reaches the end…
$active = $(‘.paging a:first’); //go back to first
}
rotate(); //Trigger the paging and slider function
}, 7000); //Timer speed in milliseconds (7 seconds)
};

rotateSwitch(); //Run function on launch

//On Hover
$(“.image_reel a”).hover(function() {
clearInterval(play); //Stop the rotation
}, function() {
rotateSwitch(); //Resume rotation timer
});

//On Click
$(“.paging a”).click(function() {
$active = $(this); //Activate the clicked paging
//Reset Timer
clearInterval(play); //Stop the rotation
rotate(); //Trigger rotation immediately
rotateSwitch(); // Resume rotation timer
return false; //Prevent browser jump to link anchor
});
});

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