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                        /焦点图轮播特效

找了好久也不知道哪里错了，滚动也实行不了

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>无标题文档</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>

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;

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 animate(offset){

var newLeft=parseInt(list.style.left)+offset;

list.style.left=newLeft+'px';

if(newLeft>-600){list.style.left=-3000+'px';

}

if(newLeft<-3000){list.style.left=-600+'px';}

}

next.onclick = function () { if (index == 5) {

index = 1;

}

else {

index += 1;

}

animate(-600);

showButton();

}

prev.onclick = function () {

if (index == 1) {

index = 5;

}

else {

index -= 1;

}

animate(600);

showButton();

}

</script>

</head>

<body>

</div>

</div>

</div>

</body>

</html>

慕粉3462803

2016-07-29

源自：焦点图轮播特效 4-1

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2 回答

_This
2016-07-30

你还没写完吧，这是我的所有代码，你比对一下吧，希望能帮到你

0 回复有任何疑惑可以回复我~

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_This
2016-07-30

<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{margin: 0;padding: 0;text-decoration: none;}
#container{width: 960px;height: 350px;overflow: hidden;position: relative;}
#list{width: 6720px;height: 350px;position: absolute;z-index: 10;}
#list img{
float: left;
}
#buttons{position: absolute;height: 10px;width: 100px;z-index: 20;bottom: 20px; left:400px;}
#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: 40; top: 150px; 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 animated=false;
var timer;

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 arrows(num){
animated=true;
var newLeft=parseInt(list.style.left)+num;
// list.style.left=-960px,它本身是个数组，所以要用parseInt()转换成数字
var time=3000;//位移总时间
var interval=10;//位移间隔时间；
var speed=num/(time/interval);//每次位移量
function go(){
if ((speed<0&&parseInt(list.style.left)>newLeft)||(speed>0&&parseInt(list.style.left)<newLeft)) {
list.style.left=parseInt(list.style.left)+speed+'px';
setTimeout(go,interval);

} else{
animated=false;
list.style.left=newLeft+'px';
if (newLeft>-960) {
list.style.left=-4800+'px';
}
if (newLeft<-4800) {
list.style.left=-960+'px';
}
};
}
go();
//alert(parseInt(list.style.left))
}

next.onclick=function(){
if (!animated) {
if (index==5) {
index=1
} else{
index+=1;
};
showButton()
arrows(-960);
};

}
prev.onclick=function(){
if (!animated) {
if (index==1) {
index=5
} else{
index-=1;
};

arrows(-960);

showButton()};
}
function play(){
timer=setInterval(function(){
next.onclick();
},3000)
}
function stop(){
clearInterval(timer);
}
for (var i = 0; i < buttons.length; i++) {
buttons[i].onclick=function(){
// 如果当前的样式为"on"则不执行下面的程序
if (this.className=='on') {
return;
};
// getAttribute()方法返回指定属性名的属性值
var myIndex=parseInt(this.getAttribute('index'));
//alert(myIndex);
var num=-960*(myIndex-index);
// alert(index);
// alert(myIndex-index);
// arrows函数把num加上当前的left值
if (animated==false) {
arrows(num);
};
index=myIndex;
showButton();
}
}
container.onmouseover=stop;
container.onmouseout=play;
}
</script>
</head>
<body>
<div id="container">
<div id="list" style="left:-960px;">
<img src="images/5.png" alt="">
<img src="images/1.png" alt="">
<img src="images/2.png" alt="">
<img src="images/3.png" alt="">
<img src="images/4.png" alt="">
<img src="images/5.png" alt="">
<img src="images/1.png" alt="">
</div>
<div id="buttons">
<span index="1"></span>
<span index="2"></span>
<span index="3"></span>
<span index="4"></span>
<span index="5"></span>
</div>
<a href="javascript:;" id="prev">&lt;</a>
<a href="javascript:;" id="next">&gt;</a>
</div>
</body>
</html>