【www.gdgbn.com--js教程】





js效果

<script>
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: {
  easeo教程ut: 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,切换数量到

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(count);//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 ? "top" : "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,//是否垂直方向(方向不能改)
  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:  4000,//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);
  }
};
</script>


    

 
 
   
 
 
 
  


    <script>
     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", 4, { vertical: false });
     
     var nums = [];
     //插入数字
     for(var i = 0, n = st._count - 1; i <= n;){
      (nums[i] = $("idnum").appendchild(document.createelement("li"))).innerhtml = ++i;
     }
     
     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" : ""; })
     }
     st.run();
    </script>

本文来源:http://www.gdgbn.com/wangyezhizuo/27691/