一，jquery方法
<!DOCTYPE html>
<
html
>
<
head
>
<
meta
http-equiv
=
"Content-Type"
content
=
"text/html; charset=utf-8"
/>
<
title
>图片轮播 jq(左右切换)</
title
>
<
style
type
=
"text/css"
>
body,div,ul,li,a,img{margin: 0;padding: 0;}
ul,li{list-style: none;}
a{text-decoration: none;}
#wrapper{position: relative;margin: 30px auto;width: 400px;height: 200px;}
#banner{position:relative;width: 400px;height: 200px;overflow: hidden;}
.imgList{position:relative;width:2000px;height:200px;z-index: 10;overflow: hidden;}
.imgList li{float:left;display: inline;}
#prev,
#next{position: absolute;top:80px;z-index: 20;cursor: pointer;opacity: 0.2;filter:alpha(opacity=20);}
#prev{left: 10px;}
#next{right: 10px;}
#prev:hover,
#next:hover{opacity: 0.5;filter:alpha(opacity=50);}
.bg{position: absolute;bottom: 0;width: 400px;height: 40px;z-index:20;opacity: 0.4;filter:alpha(opacity=40);background: black;}
.infoList{position: absolute;left: 10px;bottom: 10px;z-index: 30;}
.infoList li{display: none;}
.infoList .infoOn{display: inline;color: white;}
.indexList{position: absolute;right: 10px;bottom: 5px;z-index: 30;}
.indexList li{float: left;margin-right: 5px;padding: 2px 4px;border: 2px solid black;background: grey;cursor: pointer;}
.indexList .indexOn{background: red;font-weight: bold;color: white;}
</
style
>
</
head
>
<
body
>
<
div
id
=
"wrapper"
>
<!-- 最外层部分 -->
<
div
id
=
"banner"
>
<!-- 轮播部分 -->
<
ul
class
=
"imgList"
>
<!-- 图片部分 -->
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test1.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots1"
></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test2.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots2"
></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test3.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots3"
></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test4.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots4"
></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test5.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots5"
></
a
></
li
>
</
ul
>
<
img
src
=
"./img/prev.png"
width
=
"20px"
height
=
"40px"
id
=
"prev"
>
<
img
src
=
"./img/next.png"
width
=
"20px"
height
=
"40px"
id
=
"next"
>
<
div
class
=
"bg"
></
div
>
<!-- 图片底部背景层部分-->
<
ul
class
=
"infoList"
>
<!-- 图片左下角文字信息部分 -->
<
li
class
=
"infoOn"
>puss in boots1</
li
>
<
li
>puss in boots2</
li
>
<
li
>puss in boots3</
li
>
<
li
>puss in boots4</
li
>
<
li
>puss in boots5</
li
>
</
ul
>
<
ul
class
=
"indexList"
>
<!-- 图片右下角序号部分 -->
<
li
class
=
"indexOn"
>1</
li
>
<
li
>2</
li
>
<
li
>3</
li
>
<
li
>4</
li
>
<
li
>5</
li
>
</
ul
>
</
div
>
</
div
>
<
script
type
=
"text/javascript"
src
=
"./js/jquery.min.js"
></
script
>
<
script
type
=
"text/javascript"
>
var curIndex = 0, //当前index
imgLen = $(".imgList li").length; //图片总数
// 定时器自动变换2.5秒每次
var autoChange = setInterval(function(){
if(curIndex <
imgLen-1
){
curIndex ++;
}else{
curIndex
=
0
;
}
//调用变换处理函数
changeTo(curIndex);
},2500);
//左箭头滑入滑出事件处理
$("#prev").hover(function(){
//滑入清除定时器
clearInterval(autoChange);
},function(){
//滑出则重置定时器
autoChangeAgain();
});
//左箭头点击处理
$("#prev").click(function(){
//根据curIndex进行上一个图片处理
curIndex = (curIndex > 0) ? (--curIndex) : (imgLen - 1);
changeTo(curIndex);
});
//右箭头滑入滑出事件处理
$("#next").hover(function(){
//滑入清除定时器
clearInterval(autoChange);
},function(){
//滑出则重置定时器
autoChangeAgain();
});
//右箭头点击处理
$("#next").click(function(){
curIndex = (curIndex <
imgLen
- 1) ? (++curIndex) : 0;
changeTo(curIndex);
});
//对右下角按钮index进行事件绑定处理等
$(".indexList").find("li").each(function(item){
$(this).hover(function(){
clearInterval(autoChange);
changeTo(item);
curIndex
=
item
;
},function(){
autoChangeAgain();
});
});
//清除定时器时候的重置定时器--封装
function autoChangeAgain(){
autoChange
=
setInterval
(function(){
if(curIndex < imgLen-1){
curIndex ++;
}else{
curIndex
=
0
;
}
//调用变换处理函数
changeTo(curIndex);
},2500);
}
function changeTo(num){
var
goLeft
=
num
* 400;
$(".imgList").animate({left: "-" + goLeft + "px"},500);
$(".infoList").find("li").removeClass("infoOn").eq(num).addClass("infoOn");
$(".indexList").find("li").removeClass("indexOn").eq(num).addClass("indexOn");
}
</script>
</
body
>
</
html
>
--------------------------------------------------------------------------------------------------------------------------------------------------------------
二，原生JS方法
<!DOCTYPE html >
<
html
>
<
head
>
<
meta
http-equiv
=
"Content-Type"
content
=
"text/html; charset=utf-8"
/>
<
title
>图片轮播 js原生(左右切换)</
title
>
<
style
type
=
"text/css"
>
body,div,ul,li,a,img{margin: 0;padding: 0;}
ul,li{list-style: none;}
a{text-decoration: none;}
#wrapper{position: relative;margin: 30px auto;width: 400px;height: 200px;}
#banner{position:relative;width: 400px;height: 200px;overflow: hidden;}
.imgList{position:relative;width:2000px;height:200px;z-index: 10;overflow: hidden;}
.imgList li{float:left;display: inline;}
#prev,
#next{position: absolute;top:80px;z-index: 20;cursor: pointer;opacity: 0.2;filter:alpha(opacity=20);}
#prev{left: 10px;}
#next{right: 10px;}
#prev:hover,
#next:hover{opacity: 0.5;filter:alpha(opacity=50);}
.bg{position: absolute;bottom: 0;width: 400px;height: 40px;z-index:20;opacity: 0.4;filter:alpha(opacity=40);background: black;}
.infoList{position: absolute;left: 10px;bottom: 10px;z-index: 30;}
.infoList li{display: none;}
.infoList .infoOn{display: inline;color: white;}
.indexList{position: absolute;right: 10px;bottom: 5px;z-index: 30;}
.indexList li{float: left;margin-right: 5px;padding: 2px 4px;border: 2px solid black;background: grey;cursor: pointer;}
.indexList .indexOn{background: red;font-weight: bold;color: white;}
</
style
>
</
head
>
<
body
>
<
div
id
=
"wrapper"
>
<!-- 最外层部分 -->
<
div
id
=
"banner"
>
<!-- 轮播部分 -->
<
ul
class
=
"imgList"
>
<!-- 图片部分 -->
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test1.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots1"
></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test2.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots2"
></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test3.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots3"
></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test4.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots4"
></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"./img/test5.jpg"
width
=
"400px"
height
=
"200px"
alt
=
"puss in boots5"
></
a
></
li
>
</
ul
>
<
img
src
=
"./img/prev.png"
width
=
"20px"
height
=
"40px"
id
=
"prev"
>
<
img
src
=
"./img/next.png"
width
=
"20px"
height
=
"40px"
id
=
"next"
>
<
div
class
=
"bg"
></
div
>
<!-- 图片底部背景层部分-->
<
ul
class
=
"infoList"
>
<!-- 图片左下角文字信息部分 -->
<
li
class
=
"infoOn"
>puss in boots1</
li
>
<
li
>puss in boots2</
li
>
<
li
>puss in boots3</
li
>
<
li
>puss in boots4</
li
>
<
li
>puss in boots5</
li
>
</
ul
>
<
ul
class
=
"indexList"
>
<!-- 图片右下角序号部分 -->
<
li
class
=
"indexOn"
>1</
li
>
<
li
>2</
li
>
<
li
>3</
li
>
<
li
>4</
li
>
<
li
>5</
li
>
</
ul
>
</
div
>
</
div
>
<
script
type
=
"text/javascript"
>
var curIndex = 0, //当前index
imgArr = getElementsByClassName("imgList")[0].getElementsByTagName("li"), //获取图片组
imgLen = imgArr.length,
infoArr = getElementsByClassName("infoList")[0].getElementsByTagName("li"), //获取图片info组
indexArr = getElementsByClassName("indexList")[0].getElementsByTagName("li"); //获取控制index组
// 定时器自动变换2.5秒每次
var autoChange = setInterval(function(){
if(curIndex <
imgLen
-1){
curIndex ++;
}else{
curIndex
=
0
;
}
//调用变换处理函数
changeTo(curIndex);
},2500);
//清除定时器时候的重置定时器--封装
function autoChangeAgain(){
autoChange
=
setInterval
(function(){
if(curIndex < imgLen -1){
curIndex ++;
}else{
curIndex
=
0
;
}
//调用变换处理函数
changeTo(curIndex);
},2500);
}
//调用添加事件处理
addEvent();
//给左右箭头和右下角的图片index添加事件处理
function addEvent(){
for(var
i
=
0
;i<imgLen;i++){
//闭包防止作用域内活动对象item的影响
(function(_i){
//鼠标滑过则清除定时器，并作变换处理
indexArr[_i]
.onmouseover
=
function
(){
clearTimeout(autoChange);
changeTo(_i);
curIndex
=
_i
;
};
//鼠标滑出则重置定时器处理
indexArr[_i]
.onmouseout
=
function
(){
autoChangeAgain();
};
})(i);
}
//给左箭头prev添加上一个事件
var
prev
=
document
.getElementById("prev");
prev.onmouseover
=
function
(){
//滑入清除定时器
clearInterval(autoChange);
};
prev.onclick
=
function
(){
//根据curIndex进行上一个图片处理
curIndex = (curIndex > 0) ? (--curIndex) : (imgLen - 1);
changeTo(curIndex);
};
prev.onmouseout = function(){
//滑出则重置定时器
autoChangeAgain();
};
//给右箭头next添加下一个事件
var next = document.getElementById("next");
next.onmouseover = function(){
clearInterval(autoChange);
};
next.onclick = function(){
curIndex = (curIndex <
imgLen
- 1) ? (++curIndex) : 0;
changeTo(curIndex);
};
next.onmouseout
=
function
(){
autoChangeAgain();
};
}
//左右切换处理函数
function changeTo(num){
//设置image
var
imgList
=
getElementsByClassName
("imgList")[0];
goLeft(imgList,num*400); //左移一定距离
//设置image 的 info
var
curInfo
=
getElementsByClassName
("infoOn")[0];
removeClass(curInfo,"infoOn");
addClass(infoArr[num],"infoOn");
//设置image的控制下标 index
var
_curIndex
=
getElementsByClassName
("indexOn")[0];
removeClass(_curIndex,"indexOn");
addClass(indexArr[num],"indexOn");
}
//图片组相对原始左移dist px距离
function goLeft(elem,dist){
if(dist == 400){ //第一次时设置left为0px 或者直接使用内嵌法
style
=
"left:0;"
elem.style.left
=
"0px"
;
}
var toLeft; //判断图片移动方向是否为左
dist
= dist + parseInt(elem.style.left); //图片组相对当前移动距离
if(dist<0){
toLeft
=
false
;
dist
=
Math
.abs(dist);
}else{
toLeft
=
true
;
}
for(var
i
=
0
;i<= dist/20;i++){ //这里设定缓慢移动，10阶每阶40px
(function(_i){
var
pos
=
parseInt
(elem.style.left); //获取当前left
setTimeout(function(){
pos += (toLeft)? -(_i * 20) : (_i * 20); //根据toLeft值指定图片组位置改变
//console.log(pos);
elem.style.left
=
pos
+ "px";
},_i * 25); //每阶间隔50毫秒
})(i);
}
}
//通过class获取节点
function getElementsByClassName(className){
var classArr = [];
var
tags
=
document
.getElementsByTagName('*');
for(var item in tags){
if(tags[item].nodeType == 1){
if(tags[item].getAttribute('class') == className){
classArr.push(tags[item]);
}
}
}
return classArr; //返回
}
// 判断obj是否有此class
function hasClass(obj,cls){ //class位于单词边界
return obj.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'));
}
//给 obj添加class
function addClass(obj,cls){
if(!this.hasClass(obj,cls)){
obj.className += cls;
}
}
//移除obj对应的class
function removeClass(obj,cls){
if(hasClass(obj,cls)){
var
reg
=
new
RegExp('(\\s|^)' + cls + '(\\s|$)');
obj.className
= obj.className.replace(reg,'');
}
}
</script>
</
body
>
</
html
>