$(document).ready(function() {
var currentPosition = 0;
var slideWidth = $('img')[0].getBoundingClientRect().width;
var slides = $('.slide');
var numberOfSlides = slides.length;
var slideShowInterval;
var speed = 3000;
//Assign a timer, so it will run periodically
slideShowInterval = setInterval(changePosition, speed);
slides.wrapAll('<div id="slidesHolder"></div>')
slides.css({ 'float' : 'left' });
//set #slidesHolder width equal to the total width of all the slides
$('#slidesHolder').css('width', slideWidth * numberOfSlides);
$('#slideshow')
.prepend('<span class="nav" id="leftNav">Move Left</span>')
.append('<span class="nav" id="rightNav">Move Right</span>');
manageNav(currentPosition);
//tell the buttons what to do when clicked
$('.nav').bind('click', function() {
//determine new position
currentPosition = ($(this).attr('id')=='rightNav')
? currentPosition+1 : currentPosition-1;
//hide/show controls
manageNav(currentPosition);
clearInterval(slideShowInterval);
slideShowInterval = setInterval(changePosition, speed);
moveSlide();
});
function manageNav(position) {
//hide left arrow if position is first slide
if(position==0){ $('#leftNav').hide() }
else { $('#leftNav').show() }
//hide right arrow is slide position is last slide
if(position==numberOfSlides-1){ $('#rightNav').hide() }
else { $('#rightNav').show() }
}
/*changePosition: this is called when the slide is moved by the
timer and NOT when the next or previous buttons are clicked*/
function changePosition() {
if(currentPosition == numberOfSlides - 1) {
currentPosition = 0;
manageNav(currentPosition);
} else {
currentPosition++;
manageNav(currentPosition);
}
moveSlide();
}
//moveSlide: this function moves the slide
function moveSlide() {
$('#slidesHolder')
.animate({'marginLeft' :...
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