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【JS】如何实现图片定时滚动呢? RRS feed

  • 问题

  • 代码如下:

    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title></title>
        <style type="text/css">

     #idSlider2 {width:100%; height:50px;}
     ul{list-style:none;width:100%;
     
     }
     
     li{float:left; width:150px;}
     
     ul li img{width:150px; hight:80px;}


    </style>
    </head>
    <body>
       
            <table width="100%" border="0" cellspacing="0" cellpadding="0">
                <tr>
                    <td style="height: 88px">
                        <input id="idPre" type="image" originalsrc="http://www.veryhuo.com/uploads/allimg/0910/bank_btn_left.gif<//a>"
                            onfocus="this.blur()" /></td>
                           
                           
                           
                           
                    <td style="height: 88px">
                        <div class="container" id="idContainer2">
                            <div id="idSlider2" >
                                <ul>
                                    <li>
                                        <img src="http://www.veryhuo.com/uploads/allimg/0910/bank1.gif" /></li>
                                    <li>
                                        <img src="http://www.veryhuo.com/uploads/allimg/0910/bank2.gif" /></li>
                                    <li>
                                        <img src="http://www.veryhuo.com/uploads/allimg/0910/bank3.gif" /></li>
                                    <li>
                                        <img src="http://www.veryhuo.com/uploads/allimg/0910/bank4.gif" /></li>
                                    <li>
                                        <img src="http://www.veryhuo.com/uploads/allimg/0910/bank5.gif" /></li>
                                    <li>
                                        <img src="http://www.veryhuo.com/uploads/allimg/0910/bank6.gif" /></li>
                                    <li>
                                        <img src="http://www.veryhuo.com/uploads/allimg/0910/bank7.gif" /></li>
                                </ul>
                            </div>
                        </div>
                    </td>
                   
                   
                   
                   
                   
                    <td style="height: 88px">
                        <input id="idNext" type="image" src="http://www.veryhuo.com/uploads/allimg/0910/bank_btn_right.gif"
                            onfocus="this.blur()" /></td>
                </tr>
            </table>
      
    </body>

    <script type="text/javascript">
    var $ = function (id) {
     return "string" == typeof id ? document.getElementById(id) : id;
    };
    var Extend = function(destination, source) {
     for (var property in source) {
      destination[property] = source[property];
     }
     return destination;
    }
    var CurrentStyle = function(element){
     return element.currentStyle || document.defaultView.getComputedStyle(element, null);
    }
    var Bind = function(object, fun) {
     var args = Array.prototype.slice.call(arguments).slice(2);
     return function() {
      return fun.apply(object, args.concat(Array.prototype.slice.call(arguments)));
     }
    }
    var Tween = {
     Quart: {
      easeOut: function(t,b,c,d){
       return -c * ((t=t/d-1)*t*t*t - 1) + b;
      }
     },
     Back: {
      easeOut: function(t,b,c,d,s){
       if (s == undefined) s = 1.70158;
       return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
      }
     },
      Bounce: {
      easeOut: function(t,b,c,d){
       if ((t/=d) < (1/2.75)) {
        return c*(7.5625*t*t) + b;
       } else if (t < (2/2.75)) {
        return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
       } else if (t < (2.5/2.75)) {
        return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
       } else {
        return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
       }
      }
     }
    }
    //容器对象,滑动对象,切换数量
    var SlideTrans = function(container, slider, count, options) {
     this._slider = $(slider);
     this._container = $(container);//容器对象
     this._timer = null;//定时器
     this._count = Math.abs(6);//切换数量
     this._target = 0;//目标值
     this._t = this._b = this._c = 0;//tween参数
     this.Index = 0;//当前索引
     this.SetOptions(options); 
     this.Auto = !!this.options.Auto;
     this.Duration = Math.abs(this.options.Duration);
     this.Time = Math.abs(this.options.Time);
     this.Pause = Math.abs(this.options.Pause);
     this.Tween = this.options.Tween;
     this.onStart = this.options.onStart;
     this.onFinish = this.options.onFinish;
     
     var bVertical = !!this.options.Vertical;
     this._css = bVertical ? "left" : "left";//方向
     
     //样式设置
     var p = CurrentStyle(this._container).position;
     p == "relative" || p == "absolute" || (this._container.style.position = "relative");
     this._container.style.overflow = "hidden";
     this._slider.style.position = "absolute";
     
     this.Change = this.options.Change ? this.options.Change :
      this._slider[bVertical ? "offsetHeight" : "offsetWidth"] / this._count;
    };
    SlideTrans.prototype = {
      //设置默认属性
      SetOptions: function(options) {
     this.options = {//默认值
      Vertical: true,//滚动方向,这里是垂直,已固定,且不能修改)
      Auto:  true,//是否自动
      Change:  0,//改变量
      Duration: 50,//滑动持续时间
      Time:  10,//滑动延时
      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
      Tween:  Tween.Quart.easeOut//tween算子
     };
     Extend(this.options, options || {});
      },
      //开始切换
      Run: function(index) {
     //修正index
     index == undefined && (index = this.Index);
     index < 0 && (index = this._count - 1) || index >= this._count && (index = 0);
     //设置参数
     this._target = -Math.abs(this.Change) * (this.Index = index);
     this._t = 0;
     this._b = parseInt(CurrentStyle(this._slider)[this.options.Vertical ? "top" : "left"]);
     this._c = this._target - this._b;
     
     this.onStart();
     this.Move();
      },
      //移动
      Move: function() {
     clearTimeout(this._timer);
     //未到达目标继续移动否则进行下一次滑动
     if (this._c && this._t < this.Duration) {
      this.MoveTo(Math.round(this.Tween(this._t++, this._b, this._c, this.Duration)));
      this._timer = setTimeout(Bind(this, this.Move), this.Time);
     }else{
      this.MoveTo(this._target);
      this.Auto && (this._timer = setTimeout(Bind(this, this.Next), this.Pause));
     }
      },
      //移动到
      MoveTo: function(i) {
     this._slider.style[this._css] = i + "px";
      },
      //下一个
      Next: function() {
     this.Run(++this.Index);
      },
      //上一个
      Previous: function() {
     this.Run(--this.Index);
      },
      //停止
      Stop: function() {
     clearTimeout(this._timer); this.MoveTo(this._target);
      }
    };
    var forEach = function(array, callback, thisObject){
     if(array.forEach){
      array.forEach(callback, thisObject);
     }else{
      for (var i = 0, len = array.length; i < len; i++) { callback.call(thisObject, array[i], i, array); }
     }
    }
    var st = new SlideTrans("idContainer2", "idSlider2", 3, { Vertical: false });
    var nums = [];
    forEach(nums, function(o, i){
     o.onmouseover = function(){ o.className = "on"; st.Auto = false; st.Run(i); }
     o.onmouseout = function(){ o.className = ""; st.Auto = true; st.Run(); }
    })
    //设置按钮样式
    st.onStart = function(){
     forEach(nums, function(o, i){ o.className = st.Index == i ? "on" : ""; })
    }
    $("idNext").onclick = function(){ st.Next(); }
    $("idPre").onclick = function(){ st.Previous(); }
    st.Run();
    </script>

    </html>

    我想实现的效果如图:


    煜诚海参专卖 淘宝店铺:http://jinweb.taobao.com

    2012年5月14日 13:39

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