【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>