js幻灯片效果！

<style><!--
 
.container, .container *{margin:0; padding:0;}

.container{width:695px; height:202px; overflow:hidden;position:relative;}

.slider{position:absolute;}
.slider li{ list-style:none;display:inline;}
.slider img{ width:695px; height:202px; display:block;}

.slider2{width:2500px;}
.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 id="idTransformView2" class="container">
<ul id="idSlider2" class="slider slider2">
<li><img src="http://www.cnblogs.com/fumj/admin/images/01.jpg" alt="" data-pinit="registered" /></li>
<li><img src="http://www.cnblogs.com/fumj/admin/images/02.jpg" alt="" data-pinit="registered" /></li>
<li><img src="http://www.cnblogs.com/fumj/admin/images/03.jpg" alt="" data-pinit="registered" /></li>
</ul>
<ul id="idNum2" class="num">
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
</div>
<p>&nbsp;</p>
<div>
<p>
<script type="text/javascript">// <![CDATA[
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); }
    };
    

    
    ////////////////////////test2
    
    var objs2 = $("idNum2").getElementsByTagName("li");
    
    var tv2 = new TransformView("idTransformView2", "idSlider2",695, 3, {
        onStart: function(){ Each(objs2, function(o, i){ o.className = tv2.Index == i ? "on" : ""; }) },//按钮样式
        Up: false
    });
    
    tv2.Start();
    
    Each(objs2, function(o, i){
        o.onmouseover = function(){
            o.className = "on";
            tv2.Auto = false;
            tv2.Index = i;
            tv2.Start();
        }
        o.onmouseout = function(){
            o.className = "";
            tv2.Auto = true;
            tv2.Start();
        }
    })
    
    $("idStop").onclick = function(){ tv2.Auto = false; tv2.Stop(); }
    $("idStart").onclick = function(){ tv2.Auto = true; tv2.Start(); }
    $("idNext").onclick = function(){ tv2.Index++; tv2.Start(); }
    $("idPre").onclick = function(){ tv2.Index--;tv2.Start(); }
    $("idFast").onclick = function(){ if(--tv2.Step <= 0){tv2.Step = 1;} }
    $("idSlow").onclick = function(){ if(++tv2.Step >= 10){tv2.Step = 10;} }
    $("idReduce").onclick = function(){ tv2.Pause-=1000; if(tv2.Pause <= 0){tv2.Pause = 0;} }
    $("idAdd").onclick = function(){ tv2.Pause+=1000; if(tv2.Pause >= 5000){tv2.Pause = 5000;} }
    
    $("idReset").onclick = function(){
        tv2.Step = Math.abs(tv2.options.Step);
        tv2.Time = Math.abs(tv2.options.Time);
        tv2.Auto = !!tv2.options.Auto;
        tv2.Pause = Math.abs(tv2.options.Pause);
    }
    
}
// ]]></script>
</p>
</div>