JS图片自动轮播代码

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN”

<head>

<style>

body,div,ul,li{margin:0;padding:0;}

ul{list-style-type:none;}

body{background:#000;text-align:center;font:12px/20px Arial;}

#box_wwwzzjsnet{position:relative;width:492px;height:172px;background:#fff;border-radius:5px;border:8px solid #fff;margin:10px auto;cursor:pointer;}

#box_wwwzzjsnet .list{position:relative;width:490px;height:170px;overflow:hidden;}

#box_wwwzzjsnet .list ul{position:absolute;top:0;left:0;}

#box_wwwzzjsnet .list li{width:490px;height:170px;overflow:hidden;}

#box_wwwzzjsnet .count{position:absolute;right:0;bottom:5px;}

#box_wwwzzjsnet .count li{color:#fff;float:left;width:20px;height:20px;cursor:pointer;margin-right:5px;overflow:hidden;background:#F90;opacity:0.7;filter:alpha(opacity=70);border-radius:20px;}

#box_wwwzzjsnet .count li.current{color:#fff;opacity:1;filter:alpha(opacity=100);font-weight:700;background:#f60;}

#tmp{width:100px;height:100px;background:red;position:absolute;}

</style>

//获取ID

var $ = function (id) {return typeof id === “string” ? document.getElementById(id) : id};

//获取tagName

var $$ = function (tagName, oParent) {return (oParent || document).getElementsByTagName(tagName)};

//自动播放对象

var AutoPlay = function (id) {this.initialize(id)};

AutoPlay.prototype = {

initialize: function (id)

{

var oThis = this;

this.oBox = $(id);

this.oUl = $$(“ul”, this.oBox)[0];

this.aImg = $$(“img”, this.oBox);

this.timer = null;

this.autoTimer = null;

this.iNow = 0;

this.creatBtn();

this.aBtn = $$(“li”, this.oCount);

this.toggle();

this.autoTimer = setInterval(function ()

{

oThis.next()

}, 3000);

this.oBox.onmouseover = function ()

{

clearInterval(oThis.autoTimer)

};

this.oBox.onmouseout = function ()

{

oThis.autoTimer = setInterval(function ()

{

oThis.next()

}, 3000)

};

for (var i = 0; i < this.aBtn.length; i++)

{

this.aBtn[i].index = i;

this.aBtn[i].onmouseover = function ()

{

oThis.iNow = this.index;

oThis.toggle()

}

creatBtn: function ()

{

this.oCount = document.createElement(“ul”);

this.oFrag = document.createDocumentFragment();

this.oCount.className = “count”;

for (var i = 0; i < this.aImg.length; i++)

{

var oLi = document.createElement(“li”);

oLi.innerHTML = i + 1;

this.oFrag.appendChild(oLi)

}

this.oCount.appendChild(this.oFrag);

this.oBox.appendChild(this.oCount)

toggle: function ()

{

for (var i = 0; i < this.aBtn.length; i++) this.aBtn[i].className = “”;

this.aBtn[this.iNow].className = “current”;

this.doMove(-(this.iNow * this.aImg[0].offsetHeight))

next: function ()

{

this.iNow++;

this.iNow == this.aBtn.length && (this.iNow = 0);

this.toggle()

doMove: function (iTarget)

{

var oThis = this;

clearInterval(oThis.timer);

oThis.timer = setInterval(function ()

{

var iSpeed = (iTarget – oThis.oUl.offsetTop) / 5;

iSpeed = iSpeed > 0 ? Math.ceil(iSpeed) : Math.floor(iSpeed);

oThis.oUl.offsetTop == iTarget ? clearInterval(oThis.timer) : (oThis.oUl.style.top = oThis.oUl.offsetTop + iSpeed + “px”)

}, 30)

}

};

window.onload = function ()

{

new AutoPlay(“box_wwwzzjsnet”);

};

</script>

</head>

<body>

<ul>

</ul>

</div>

</body>

</html>

2013年6月28日学习之

代码来之：

http://www.zzjs.net/html/2945.html