原生javascript图片自动切换功能

一、效果图

二、html代码

<style type="text/css"> .container, .container *{margin:0; padding:0;}.container{width:408px; height:168px; overflow:hidden;position:relative;}.slider{position:absolute;}.slider li{ list-style:none;display:inline;}.slider img{ width:408px; height:168px; display:block;}.slider2{width:2000px;}.slider2 li{float:left;}.num{ position:absolute; right:5px; bottom:5px;}.num li{float: left;color: #FF7300;text-align: center;line-height: 16px;width: 16px;height: 16px;font-family: Arial;font-size: 12px;cursor: pointer;overflow: hidden;margin: 3px 1px;border: 1px solid #FF7300;background-color: #fff;}.num li.on{color: #fff;line-height: 21px;width: 21px;height: 21px;font-size: 16px;margin: 0 1px;border: 0;background-color: #FF7300;font-weight: bold;}</style><div class="container" id="idTransformView2">  <ul class="slider slider2" id="idSlider2">    <li><img src="images/01.jpg"/></li>    <li><img src="images/02.jpg"/></li>    <li><img src="images/03.jpg"/></li>  </ul>  <ul class="num" id="idNum2">    <li>1</li>    <li>2</li>    <li>3</li>  </ul></div>

三、源代码

var $ = function (id) {return "string" == typeof id ? document.getElementById(id) : id;};var Class = {  create: function() {return function() {  this.initialize.apply(this, arguments);}  }}Object.extend = function(destination, source) {for (var property in source) {destination[property] = source[property];}return destination;}var TransformView = Class.create();TransformView.prototype = {  //容器对象,滑动对象,切换参数,切换数量  initialize: function(container, slider, parameter, count, options) {if(parameter <= 0 || count <= 0) return;var oContainer = $(container), oSlider = $(slider), oThis = this;this.Index = 0;//当前索引this._timer = null;//定时器this._slider = oSlider;//滑动对象this._parameter = parameter;//切换参数this._count = count || 0;//切换数量this._target = 0;//目标参数this.SetOptions(options);this.Up = !!this.options.Up;this.Step = Math.abs(this.options.Step);this.Time = Math.abs(this.options.Time);this.Auto = !!this.options.Auto;this.Pause = Math.abs(this.options.Pause);this.onStart = this.options.onStart;this.onFinish = this.options.onFinish;oContainer.style.overflow = "hidden";oContainer.style.position = "relative";oSlider.style.position = "absolute";oSlider.style.top = oSlider.style.left = 0;  },  //设置默认属性  SetOptions: function(options) {this.options = {//默认值Up:true,//是否向上(否则向左)Step:5,//滑动变化率Time:10,//滑动延时Auto:true,//是否自动转换Pause:2000,//停顿时间(Auto为true时有效)onStart:function(){},//开始转换时执行onFinish:function(){}//完成转换时执行};Object.extend(this.options, options || {});  },  //开始切换设置  Start: function() {if(this.Index < 0){this.Index = this._count - 1;} else if (this.Index >= this._count){ this.Index = 0; }this._target = -1 * this._parameter * this.Index;this.onStart();this.Move();  },  //移动  Move: function() {clearTimeout(this._timer);var oThis = this, style = this.Up ? "top" : "left",        iNow = parseInt(this._slider.style[style]) || 0,        iStep = this.GetStep(this._target, iNow);if (iStep != 0) {this._slider.style[style] = (iNow + iStep) + "px";this._timer = setTimeout(function(){ oThis.Move(); }, this.Time);} else {this._slider.style[style] = this._target + "px";this.onFinish();if (this.Auto) { this._timer = setTimeout(function(){ oThis.Index++; oThis.Start(); }, this.Pause); }}  },  //获取步长  GetStep: function(iTarget, iNow) {var iStep = (iTarget - iNow) / this.Step;if (iStep == 0) return 0;if (Math.abs(iStep) < 1) return (iStep > 0 ? 1 : -1);return iStep;  },  //停止  Stop: function(iTarget, iNow) {clearTimeout(this._timer);this._slider.style[this.Up ? "top" : "left"] = this._target + "px";  }};window.onload=function(){function Each(list, fun){for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }};var objs = $("idNum2").getElementsByTagName("li");var tv = new TransformView("idTransformView2", "idSlider2", 408, 3, {onStart: function(){ Each(objs, function(o, i){ o.className = tv.Index == i ? "on" : ""; }) },//按钮样式Up: false});tv.Start();Each(objs, function(o, i){o.onmouseover = function(){o.className = "on";tv.Auto = false;tv.Index = i;tv.Start();}o.onmouseout = function(){o.className = "";tv.Auto = true;tv.Start();}})}

一看就名目了然了，所以就不细讲解代码！！

源文件下载地址：http://download.csdn.net/detail/huadonggmail/5188140