使用jQuery制作基础的Web图片轮播效果

color: #fff;
text-align: center;
display: block;
font-family: "simsun";
font-size: 22px;
width: 28px;
height: 62px;
line-height: 62px;
margin-top: -31px;
position: absolute;
top: 50%;
}
.slider-page a:HOVER {
background: rgba(0, 0, 0, 0.4);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#66000000,endColorstr=#66000000);
}
.slider-next {
left: 100%;
margin-left: -28px;
}
</style>
<script type="text/javascript">
$(document).ready(function() {
var length,
currentIndex = 0,
interval,
hasStarted = false, //是否已经开始轮播
t = 3000; //轮播时间间隔
length = $('.slider-panel').length;

//将除了第一张图片隐藏
$('.slider-panel:not(:first)').hide();
//将第一个slider-item设为激活状态
$('.slider-item:first').addClass('slider-item-selected');
//隐藏向前、向后翻按钮
$('.slider-page').hide();

//鼠标上悬时显示向前、向后翻按钮,停止滑动，鼠标离开时隐藏向前、向后翻按钮，开始滑动
$('.slider-panel, .slider-pre, .slider-next').hover(function() {
stop();
$('.slider-page').show();
}, function() {
$('.slider-page').hide();
start();
});

$('.slider-item').hover(function(e) {
stop();
var preIndex = $(".slider-item").filter(".slider-item-selected").index();
currentIndex = $(this).index();
play(preIndex, currentIndex);
}, function() {
start();
});

$('.slider-pre').unbind('click');
$('.slider-pre').bind('click', function() {
pre();
});
$('.slider-next').unbind('click');
$('.slider-next').bind('click', function() {
next();
});

/**
* 向前翻页
*/
function pre() {
var preIndex = currentIndex;
currentIndex = (--currentIndex + length) % length;
play(preIndex, currentIndex);
}
/**
* 向后翻页
*/
function next() {
var preIndex = currentIndex;
currentIndex = ++currentIndex % length;
play(preIndex, currentIndex);
}
/**
* 从preIndex页翻到currentIndex页
* preIndex 整数，翻页的起始页
* currentIndex 整数，翻到的那页
*/
function play(preIndex, currentIndex) {
$('.slider-panel').eq(preIndex).fadeOut(500)
.parent().children().eq(currentIndex).fadeIn(1000);
$('.slider-item').removeClass('slider-item-selected');
$('.slider-item').eq(currentIndex).addClass('slider-item-selected');
}

/**
* 开始轮播
*/
function start() {
if(!hasStarted) {
hasStarted = true;
interval = setInterval(next, t);
}
}
/**
* 停止轮播
*/
function stop() {
clearInterval(interval);
hasStarted = false;
}