js自动切换的代码

salim_li 2010-06-05

展开全文

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www./TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www./1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JavaScript 图片切换展示效果_收集自_http://www.</title>
</head>
<body>
<style type="text/css">
.container, .container *{margin:0; padding:0;}
.container{width:408px; height:168px; overflow:hidden;position:relative;}
.slider{position:absolute;}
.slider li{ list-style:none;display:inline;}
.slider img{ width:408px; height:168px; display:block;}
.slider2{width:2000px;}
.slider2 li{float:left;}
.num{ position:absolute; right:5px; bottom:5px;}
.num li{
float: left;
color: #FF7300;
text-align: center;
line-height: 16px;
width: 16px;
height: 16px;
font-family: Arial;
font-size: 12px;
cursor: pointer;
overflow: hidden;
margin: 3px 1px;
border: 1px solid #FF7300;
background-color: #fff;
}
.num li.on{
color: #fff;
line-height: 21px;
width: 21px;
height: 21px;
font-size: 16px;
margin: 0 1px;
border: 0;
background-color: #FF7300;
font-weight: bold;
}
</style>
<div class="container" id="idTransformView">
<ul class="slider" id="idSlider">
    <li><img src="1.jpg"/></li>
    <li><img src="2.jpg"/></li>
    <li><img src="3.gif"/></li>
</ul>
<ul class="num" id="idNum">
    <li>1</li>
    <li>2</li>
    <li>3</li>
</ul>
</div>
<br />
<div class="container" id="idTransformView2">
<ul class="slider slider2" id="idSlider2">
    <li><img src="1.jpg"/></li>
    <li><img src="2.jpg"/></li>
    <li><img src="3.gif"/></li>
</ul>
<ul class="num" id="idNum2">
    <li>1</li>
    <li>2</li>
    <li>3</li>
</ul>
</div>
<br />
<div>
<input id="idStop" type="button" value=" 停止自动 " />
<input id="idStart" type="button" value=" 开始自动 " />
<br /><br /><input id="idPre" type="button" value=" <- 上一个 " />
<input id="idNext" type="button" value=" 下一个 -> " />
<br /><br />
切换速度：
<input id="idFast" type="button" value=" + 加速 " />
<input id="idSlow" type="button" value=" - 减速 " />
<br /><br />
停顿时间：
<input id="idAdd" type="button" value=" + 加时间 " />
<input id="idReduce" type="button" value=" - 减时间 " />
<br /><br />
<input id="idReset" type="button" value=" Reset " />
</div>
<script type="text/javascript">
var $ = function (id) {
return "string" == typeof id ? document.getElementById(id) : id;
};
var Class = {
create: function() {
return function() {
   this.initialize.apply(this, arguments);
}
}
}
Object.extend = function(destination, source) {
for (var property in source) {
   destination[property] = source[property];
}
return destination;
}
var TransformView = Class.create();
TransformView.prototype = {
//容器对象,滑动对象,切换参数,切换数量
initialize: function(container, slider, parameter, count, options) {
if(parameter <= 0 || count <= 0) return;
var oContainer = $(container), oSlider = $(slider), oThis = this;
this.Index = 0;//当前索引

this._timer = null;//定时器
this._slider = oSlider;//滑动对象
this._parameter = parameter;//切换参数
this._count = count || 0;//切换数量
this._target = 0;//目标参数

this.SetOptions(options);

this.Up = !!this.options.Up;
this.Step = Math.abs(this.options.Step);
this.Time = Math.abs(this.options.Time);
this.Auto = !!this.options.Auto;
this.Pause = Math.abs(this.options.Pause);
this.onStart = this.options.onStart;
this.onFinish = this.options.onFinish;

oContainer.style.overflow = "hidden";
oContainer.style.position = "relative";

oSlider.style.position = "absolute";
oSlider.style.top = oSlider.style.left = 0;
},
//设置默认属性
SetOptions: function(options) {
this.options = {//默认值
   Up:    true,//是否向上(否则向左)
   Step:   5,//滑动变化率
   Time:   10,//滑动延时
   Auto:   true,//是否自动转换
   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
};
Object.extend(this.options, options || {});
},
//开始切换设置
Start: function() {
if(this.Index < 0){
   this.Index = this._count - 1;
} else if (this.Index >= this._count){ this.Index = 0; }

this._target = -1 * this._parameter * this.Index;
this.onStart();
this.Move();
},
//移动
Move: function() {
clearTimeout(this._timer);
var oThis = this, style = this.Up ? "top" : "left", iNow = parseInt(this._slider.style[style]) || 0, iStep = this.GetStep(this._target, iNow);

if (iStep != 0) {
   this._slider.style[style] = (iNow + iStep) + "px";
   this._timer = setTimeout(function(){ oThis.Move(); }, this.Time);
} else {
   this._slider.style[style] = this._target + "px";
   this.onFinish();
   if (this.Auto) { this._timer = setTimeout(function(){ oThis.Index++; oThis.Start(); }, this.Pause); }
}
},
//获取步长
GetStep: function(iTarget, iNow) {
var iStep = (iTarget - iNow) / this.Step;
if (iStep == 0) return 0;
if (Math.abs(iStep) < 1) return (iStep > 0 ? 1 : -1);
return iStep;
},
//停止
Stop: function(iTarget, iNow) {
clearTimeout(this._timer);
this._slider.style[this.Up ? "top" : "left"] = this._target + "px";
}
};
window.onload=function(){
function Each(list, fun){
   for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }
};

var objs = $("idNum").getElementsByTagName("li");

var tv = new TransformView("idTransformView", "idSlider", 168, 3, {
onStart : function(){ Each(objs, function(o, i){ o.className = tv.Index == i ? "on" : ""; }) }//按钮样式
});

tv.Start();

Each(objs, function(o, i){
   o.onmouseover = function(){
    o.className = "on";
    tv.Auto = false;
    tv.Index = i;
    tv.Start();
   }
   o.onmouseout = function(){
    o.className = "";
    tv.Auto = true;
    tv.Start();
   }
})

////////////////////////test2

var objs2 = $("idNum2").getElementsByTagName("li");

var tv2 = new TransformView("idTransformView2", "idSlider2", 408, 3, {
onStart: function(){ Each(objs2, function(o, i){ o.className = tv2.Index == i ? "on" : ""; }) },//按钮样式
Up: false
});

tv2.Start();

Each(objs2, function(o, i){
   o.onmouseover = function(){
    o.className = "on";
    tv2.Auto = false;
    tv2.Index = i;
    tv2.Start();
   }
   o.onmouseout = function(){
    o.className = "";
    tv2.Auto = true;
    tv2.Start();
   }
})

$("idStop").onclick = function(){ tv2.Auto = false; tv2.Stop(); }
$("idStart").onclick = function(){ tv2.Auto = true; tv2.Start(); }
$("idNext").onclick = function(){ tv2.Index++; tv2.Start(); }
$("idPre").onclick = function(){ tv2.Index--;tv2.Start(); }
$("idFast").onclick = function(){ if(--tv2.Step <= 0){tv2.Step = 1;} }
$("idSlow").onclick = function(){ if(++tv2.Step >= 10){tv2.Step = 10;} }
$("idReduce").onclick = function(){ tv2.Pause-=1000; if(tv2.Pause <= 0){tv2.Pause = 0;} }
$("idAdd").onclick = function(){ tv2.Pause+=1000; if(tv2.Pause >= 5000){tv2.Pause = 5000;} }

$("idReset").onclick = function(){
   tv2.Step = Math.abs(tv2.options.Step);
   tv2.Time = Math.abs(tv2.options.Time);
   tv2.Auto = !!tv2.options.Auto;
   tv2.Pause = Math.abs(tv2.options.Pause);
}

}
</script>
</body>
</html>