一段代码··新手求注释

[a_6543216_bbb]

<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(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>

</head>

<body style="text-align:center">



<DIV id=idContainer2 class=container>

<TABLE id=idSlider2 border=0 cellSpacing=0 cellPadding=0>

  <TBODY>

  <TR>

    <TD class=td_f><A href="http://www.lanrentuku.com/" target="_blank"><IMG src="images/01.jpg"></A></TD>

    <TD class=td_f><A href="http://www.lanrentuku.com/" target="_blank"><IMG src="images/02.jpg"></A></TD>

    <TD class=td_f><A href="http://www.lanrentuku.com/" target="_blank"><IMG src="images/03.jpg"></A></TD>

    <TD class=td_f><A href="http://www.lanrentuku.com/" target="_blank"><IMG src="images/04.jpg"></A></TD>

    <TD class=td_f><A href="http://www.lanrentuku.com/" target="_blank"><IMG src="images/05.jpg"></A></TD>

   </TR></TBODY></TABLE>

<UL id=idNum class=num></UL>

</DIV>



<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", 5, { 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>

很多看不懂··求注释···

[lijianc23]

这也太长了吧。。。

[tarena5525]

路过，，，，

[zlblog]

代码过长，无法注释。

欢迎光临我的博客

[PerterPon]

这也叫一段代码？不如用Google把代码翻译成中文看吧

[futurebp]

楼主人才啊、、

[xiage]

//首先这个一个工厂方法,通常用来获取dom对象.类似于jquery里的$('#...')方法.
//判断传入的是字符串还是其他对象,如果是字符串则返回id为该字符串的dom对象.
var $ = function (id) {

return "string" == typeof id ? document.getElementById(id) : id;

};


//这个方法应该叫做属性拷贝吧,遍历source的属性,然后填充的destination里,使destination具有source所有的public属性.
var Extend = function(destination, source) {

for (var property in source) {

destination[property] = source[property];

}

return destination;

}


//这个应该还有其他的js文件吧...
var CurrentStyle = function(element){

return element.currentStyle || document.defaultView.getComputedStyle(element, null);

}


//一般用于方法注入 例如给setTimeOut(fun,seconds,pars)例子:http://blog.csdn.net/xiage/article/details/4252126
var Bind = function(object, fun) {
//截取从第三个参数开始的所有参数
var args = Array.prototype.slice.call(arguments).slice(2);

return function() {
//把获取的参数传递给 传入的函数句柄(fun)
return fun.apply(object, args.concat(Array.prototype.slice.call(arguments)));

}

}


//这个就是定义对象了,具体的业务不解.
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;

}

}

}

}