这篇文章主要介绍了关于JS与JQ实现焦点图轮播效果，有着一定的参考价值，现在分享给大家，有需要的朋友可以参考一下
JS实现焦点图轮播效果
效果图：
代码如下，复制即可使用：
(不过里面的图片路径需要自己改成自己的图片路径，否则是没有图片显示的哦)
<!DOCTYPE html><html><head>
<meta charset="UTF-8">
<title>JS实现焦点图轮播效果</title>
<style type="text/css">
*{ margin: 0; padding: 0; text-decoration: none;}
body { padding: 20px;}
#container { width: 600px; height: 400px; border: 3px solid #333; overflow: hidden; position: relative;}
#list { width: 4200px; height: 400px; position: absolute; z-index: 1;}
#list img { float: left;}
#buttons { position: absolute; height: 10px; width: 100px; z-index: 2; bottom: 20px; left: 250px;}
#buttons span { cursor: pointer; float: left; border: 1px solid #fff; width: 10px; height: 10px; border-radius: 50%; background: #333; margin-right: 5px;}
#buttons .on { background: orangered;}
.arrow { cursor: pointer; display: none; line-height: 39px; text-align: center; font-size: 36px; font-weight: bold; width: 40px; height: 40px; position: absolute; z-index: 2; top: 180px; background-color: RGBA(0,0,0,.3); color: #fff;}
.arrow:hover { background-color: RGBA(0,0,0,.7);}
#container:hover .arrow { display: block;}
#prev { left: 20px;}
#next { right: 20px;}
</style>
<script type="text/javascript">
window.onload = function () { var container = document.getElementById('container'); var list = document.getElementById('list'); var buttons = document.getElementById('buttons').getElementsByTagName('span'); var prev = document.getElementById('prev'); var next = document.getElementById('next'); var index = 1; var len = 5; var animated = false; var interval = 3000; var timer; function animate (offset) { if (offset == 0) { return;
}
animated = true; var time = 300; var inteval = 10; var speed = offset/(time/inteval); var left = parseInt(list.style.left) + offset; var go = function (){ if ( (speed > 0 && parseInt(list.style.left) < left) || (speed < 0 && parseInt(list.style.left) > left)) {
list.style.left = parseInt(list.style.left) + speed + 'px';
setTimeout(go, inteval);
} else {
list.style.left = left + 'px'; if(left>-200){
list.style.left = -600 * len + 'px';
} if(left<(-600 * len)) {
list.style.left = '-600px';
}
animated = false;
}
}
go();
} function showButton() { for (var i = 0; i < buttons.length ; i++) { if( buttons[i].className == 'on'){
buttons[i].className = ''; break;
}
}
buttons[index - 1].className = 'on';
} function play() {
timer = setTimeout(function () {
next.onclick();
play();
}, interval);
} function stop() {
clearTimeout(timer);
}
next.onclick = function () { if (animated) { return;
} if (index == 5) {
index = 1;
} else {
index += 1;
}
animate(-600);
showButton();
}
prev.onclick = function () { if (animated) { return;
} if (index == 1) {
index = 5;
} else {
index -= 1;
}
animate(600);
showButton();
} for (var i = 0; i < buttons.length; i++) {
buttons[i].onclick = function () { if (animated) { return;
} if(this.className == 'on') { return;
} var myIndex = parseInt(this.getAttribute('index')); var offset = -600 * (myIndex - index);
animate(offset);
index = myIndex;
showButton();
}
}
container.onmouseover = stop;
container.onmouseout = play;
play();
} </script></head><body><div id="container">
<div id="list" style="left: -600px;">
<!-- 放最后的一张图片 -图片需要改为自己的图片路径 --> <img src="img/5.jpg" alt="1"/>
<img src="img/1.jpg" alt="1"/>
<img src="img/2.jpg" alt="2"/>
<img src="img/3.jpg" alt="3"/>
<img src="img/4.jpg" alt="4"/>
<img src="img/5.jpg" alt="5"/>
<!-- 放第一张的图片 -->
<img src="img/1.jpg" alt="5"/>
</div>
<div id="buttons">
<span index="1" class="on"></span>
<span index="2"></span>
<span index="3"></span>
<span index="4"></span>
<span index="5"></span>
</div>
<a href="javascript:;" id="prev" class="arrow"><</a>
<a href="javascript:;" id="next" class="arrow">></a></div></body></html>JQ实现焦点图轮播效果（一）
效果图：
图片素材 ：
代码如下，复制即可使用：
（不过里面的JQ路径和图片路径需要自己改成自己的JQ路径和图片路径，否则是没有效果显示的哦）
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JQ实现焦点图轮播效果（一）</title>
<style type="text/css">
*{ margin: 0; padding: 0; text-decoration: none;}
body { padding: 20px;}
#container { width: 600px; height: 400px; border: 3px solid #333; overflow: hidden; position: relative;}
#list { width: 4200px; height: 400px; position: absolute; z-index: 1;}
#list img { float: left;}
#buttons { position: absolute; height: 10px; width: 100px; z-index: 2; bottom: 20px; left: 250px;}
#buttons span { cursor: pointer; float: left; border: 1px solid #fff; width: 10px; height: 10px; border-radius: 50%; background: #333; margin-right: 5px;}
#buttons .on { background: orangered;}
.arrow { cursor: pointer; display: none; line-height: 39px; text-align: center; font-size: 36px; font-weight: bold; width: 40px; height: 40px; position: absolute; z-index: 2; top: 180px; background-color: RGBA(0,0,0,.3); color: #fff;}
.arrow:hover { background-color: RGBA(0,0,0,.7);}
#container:hover .arrow { display: block;}
#prev { left: 20px;}
#next { right: 20px;}
</style>
<!-- 此处需要改为自己的JQ路径 -->
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript">
$(function () {
var container = $('#container');
var list = $('#list');
var buttons = $('#buttons span');
var prev = $('#prev');
var next = $('#next');
var index = 1;
var len = 5;
var interval = 3000;
var timer;
function animate (offset) {
var left = parseInt(list.css('left')) + offset;
if (offset>0) {
offset = '+=' + offset;
}
else {
offset = '-=' + Math.abs(offset);
}
list.animate({'left': offset}, 300, function () {
if(left > -200){
list.css('left', -600 * len);
}
if(left < (-600 * len)) {
list.css('left', -600);
}
});
}
function showButton() {
buttons.eq(index-1).addClass('on').siblings().removeClass('on');
}
function play() {
timer = setTimeout(function () {
next.trigger('click');
play();
}, interval);
}
function stop() {
clearTimeout(timer);
}
next.bind('click', function () {
if (list.is(':animated')) {
return;
}
if (index == 5) {
index = 1;
}
else {
index += 1;
}
animate(-600);
showButton();
});
prev.bind('click', function () {
if (list.is(':animated')) {
return;
}
if (index == 1) {
index = 5;
}
else {
index -= 1;
}
animate(600);
showButton();
});
buttons.each(function () {
$(this).bind('click', function () {
if (list.is(':animated') || $(this).attr('class')=='on') {
return;
}
var myIndex = parseInt($(this).attr('index'));
var offset = -600 * (myIndex - index);
animate(offset);
index = myIndex;
showButton();
})
});
container.hover(stop, play);
play();
});
</script>
</head>
<body>
<div id="container">
<div id="list" style="left: -600px;">
<!-- 放最后的一张图片 -此处需要改为自己的图片路径 -->
<img src="img/5.jpg" alt="1"/>
<img src="img/1.jpg" alt="1"/>
<img src="img/2.jpg" alt="2"/>
<img src="img/3.jpg" alt="3"/>
<img src="img/4.jpg" alt="4"/>
<img src="img/5.jpg" alt="5"/>
<!-- 放第一张的图片 -->
<img src="img/1.jpg" alt="5"/>
</div>
<div id="buttons">
<span index="1" class="on"></span>
<span index="2"></span>
<span index="3"></span>
<span index="4"></span>
<span index="5"></span>
</div>
<a href="javascript:;" id="prev" class="arrow"><</a>
<a href="javascript:;" id="next" class="arrow">></a>
</div>
</body>
</html>JQ实现焦点图轮播效果（二）
效果图：
图片素材 ：
、
、
、
左右按钮素材 ：
， 左右按钮 IE6版本素材 ： 
代码如下，复制即可使用：
（不过里面的JQ路径和图片路径需要自己改成自己的JQ路径和图片路径，否则是没有效果显示的哦）
（适用浏览器：IE8、360、FireFox、Chrome、Safari、Opera、傲游、搜狗、世界之窗.）
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JQ实现焦点图轮播效果（二）</title>
<!-- 此处需要改为自己的JQ路径 -->
<script type="text/javascript" src="js/jquery.min.js"></script>
<style>
/* CSS Document */
body,ul,li{ padding:0; margin:0;}
ul,li{ list-style:none;}
img{ border:none;}
a{ color:#6cf;}
a:hover{ color:#84B263;}
.box{ width:980px; margin:0 auto; position:relative; overflow:hidden; _height:100%;}
.picbox{ width:980px; height:115px; overflow:hidden; position:relative;}
.piclist{ height:115px;position:absolute; left:0px; top:0px}
.piclist li{ background:#eee; margin-right:20px; padding:5px; float:left;}
.swaplist{ position:absolute; left:-3000px; top:0px}
/*这里需要改成自己的图片路径*/
.og_prev,.og_next{ width:30px; height:50px; background:url(../images/icon.png) no-repeat; background:url(../images/icon_ie6.png) no-repeat\9; position:absolute; top:33px; z-index:99; cursor:pointer;filter:alpha(opacity=70); opacity:0.7;}
.og_prev{ background-position:0 -60px; left:4px;}
.og_next{ background-position:0 0; right:4px;}
</style>
</head>
<body>
<div style="margin-top:50px;">
<div>
<ul class="piclist mainlist">
<!-- 此处需要改为自己的图片路径 -->
<li><a href="#" target="_blank"><img src="images/1.jpg" width="220" height="105" /></a></li>
<li><a href="#" target="_blank"><img src="images/2.jpg" /></a></li>
<li><a href="#" target="_blank"><img src="images/3.jpg" /></a></li>
<li><a href="#" target="_blank"><img src="images/4.jpg" /></a></li>
<li><a href="#" target="_blank"><img src="images/1.jpg" /></a></li>
<li><a href="#" target="_blank"><img src="images/2.jpg" /></a></li>
<li><a href="#" target="_blank"><img src="images/3.jpg" /></a></li>
<li><a href="#" target="_blank"><img src="images/4.jpg" /></a></li>
</ul>
<ul class="piclist swaplist"></ul>
</div>
<div></div>
<div></div>
</div>
<script>
// JavaScript Document
$(document).ready(function(e) {
/***不需要自动滚动，去掉即可***/
time = window.setInterval(function(){
$('.og_next').click();
},5000);
/***不需要自动滚动，去掉即可***/
linum = $('.mainlist li').length;//图片数量
w = linum * 250;//ul宽度
$('.piclist').css('width', w + 'px');//ul宽度
$('.swaplist').html($('.mainlist').html());//复制内容
$('.og_next').click(function(){
if($('.swaplist,.mainlist').is(':animated')){
$('.swaplist,.mainlist').stop(true,true);
}
if($('.mainlist li').length>4){//多于4张图片
ml = parseInt($('.mainlist').css('left'));//默认图片ul位置
sl = parseInt($('.swaplist').css('left'));//交换图片ul位置
if(ml<=0 && ml>w*-1){//默认图片显示时
$('.swaplist').css({left: '1000px'});//交换图片放在显示区域右侧
$('.mainlist').animate({left: ml - 1000 + 'px'},'slow');//默认图片滚动
if(ml==(w-1000)*-1){//默认图片最后一屏时
$('.swaplist').animate({left: '0px'},'slow');//交换图片滚动
}
}else{//交换图片显示时
$('.mainlist').css({left: '1000px'})//默认图片放在显示区域右
$('.swaplist').animate({left: sl - 1000 + 'px'},'slow');//交换图片滚动
if(sl==(w-1000)*-1){//交换图片最后一屏时
$('.mainlist').animate({left: '0px'},'slow');//默认图片滚动
}
}
}
})
$('.og_prev').click(function(){
if($('.swaplist,.mainlist').is(':animated')){
$('.swaplist,.mainlist').stop(true,true);
}
if($('.mainlist li').length>4){
ml = parseInt($('.mainlist').css('left'));
sl = parseInt($('.swaplist').css('left'));
if(ml<=0 && ml>w*-1){
$('.swaplist').css({left: w * -1 + 'px'});
$('.mainlist').animate({left: ml + 1000 + 'px'},'slow');
if(ml==0){
$('.swaplist').animate({left: (w - 1000) * -1 + 'px'},'slow');
}
}else{
$('.mainlist').css({left: (w - 1000) * -1 + 'px'});
$('.swaplist').animate({left: sl + 1000 + 'px'},'slow');
if(sl==0){
$('.mainlist').animate({left: '0px'},'slow');
}
}
}
})
});
$(document).ready(function(){
$('.og_prev,.og_next').hover(function(){
$(this).fadeTo('fast',1);
},function(){
$(this).fadeTo('fast',0.7);
})
})
</script>
</body>
</html>如有错误，欢迎联系我改正，非常感谢！！！
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