仿淘宝首页图片切换
资料来源:http://www.cnblogs.com/cloudgamer/archive/2008/07/06/SlideTrans.html?page=2#pagedcomment
效果展示:
测试环境:IE8 (待续)
程序代码：
代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>仿淘宝首页图片切换</title>
<style type="text/css">
.container ul, .container li
{
list-style: none;
margin: 0;
padding: 0;
}
.container, .container img
{
width: 470px;
height: 150px;
}
.load
{
/*此处background-position:50% 50% 似乎不作用(限blog页面)*/
background: url(http://img02.taobaocdn.com/tps/i2/T16WJqXaXeXXXXXXXX-32-32.gif) #ebf5fa no-repeat 225px 55px;
width: 470px;
height: 150px;
overflow: hidden;
}
.container img
{
border: 0;
vertical-align: top;
}
.num
{
position: absolute;
right: 5px;
bottom: 5px;
font: 12px/1.5 tahoma, arial;
height: 18px;
}
.num li
{
float: left;
color: #d94b01;
text-align: center;
line-height: 16px;
width: 16px;
height: 16px;
font-family: Arial;
font-size: 11px;
cursor: pointer;
margin-left: 3px;
border: 1px solid #f47500;
background-color: #fcf2cf;
}
.num li.on
{
line-height: 18px;
width: 18px;
height: 18px;
font-size: 14px;
margin-top: -2px;
background-color: #ff9415;
font-weight: bold;
color: #FFF;
}
</style>
<script type="text/javascript">
var $$ = function (id) {
return "string" == typeof id ? document.getElementById(id) : id;
};
var Extend = function (destination, source) {
for (var property in source) {
destination[property] = source[property];
}
return destination;
}
var CurrentStyle = function (element) {
return element.currentStyle || document.defaultView.getComputedStyle(element, null);
}
var Bind = function (object, fun) {
var args = Array.prototype.slice.call(arguments).slice(2);
return function () {
return fun.apply(object, args.concat(Array.prototype.slice.call(arguments)));
}
}
var forEach = function (array, callback, thisObject) {
if (array.forEach) {
array.forEach(callback, thisObject);
} else {
for (var i = 0, len = array.length; i < len; i++) { callback.call(thisObject, array[i], i, array); }
}
}
var Tween = {
Quart: {
easeOut: function (t, b, c, d) {
return -c * ((t = t / d - 1) * t * t * t - 1) + b;
}
},
Back: {
easeOut: function (t, b, c, d, s) {
if (s == undefined) s = 1.70158;
return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
}
},
Bounce: {
easeOut: function (t, b, c, d) {
if ((t /= d) < (1 / 2.75)) {
return c * (7.5625 * t * t) + b;
} else if (t < (2 / 2.75)) {
return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b;
} else if (t < (2.5 / 2.75)) {
return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b;
} else {
return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b;
}
}
}
}
//容器对象,滑动对象,切换数量
var SlideTrans = function (container, slider, count, options) {
this._slider = $$(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: 30, //滑动持续时间
Time: 10, //滑动延时
Pause: 3000, //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>
<div class="container load" id="idContainer">
<ul id="idSlider">
<li><a href="#">
<img src="http://img08.taobaocdn.com/tps/i8/T1_mxCXhBGXXXXXXXX-470-150.jpg" alt="" />
</a></li>
<li><a href="#">
<img src="http://img.alimama.cn/bcrm/adboard/picture/2010-06-10/100610131313970.gif" alt="" />
</a></li>
<li><a href="#">
<img src="http://img.alimama.cn/bcrm/adboard/picture/2010-06-11/100611120247446.jpg" alt="" />
</a></li>
<li><a href="#">
<img src="http://img.alimama.cn/bcrm/adboard/picture/2010-06-11/100611112912364.jpg" alt="" />
</a></li>
<li><a href="#">
<img src="http://img01.taobaocdn.com/tps/i1/T1KpNDXmBaXXXXXXXX-470-150.gif" alt="" />
</a></li>
</ul>
<ul class="num" id="idNum">
</ul>
</div>
<script type="text/javascript">
var nums = [], timer, n = $$("idSlider").getElementsByTagName("li").length,
st = new SlideTrans("idContainer", "idSlider", n, {
onStart: function () {//设置按钮样式
forEach(nums, function (o, i) {
o.className = st.Index == i ? "on" : "";
})
}
});
for (var i = 1; i <= n; AddNum(i++)) {
};
function AddNum(i) {
var num = $$("idNum").appendChild(document.createElement("li"));
num.innerHTML = i--;
num.onmouseover = function () {
timer = setTimeout(function () { num.className = "on"; st.Auto = false; st.Run(i); }, 200);
}
num.onmouseout = function () { clearTimeout(timer); num.className = ""; st.Auto = true; st.Run(); }
nums[i] = num;
}
st.Run();
</script>
</body>
</html>
