JavaScript 图片切换展示效果alibaba拓展版- Javascript

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Javascript 中的 JavaScript 图片切换展示效果alibaba拓展版

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-10-12 浏览: 242 ::

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js鼠标、键盘事件实例代码 Javascript 小技巧全集

看到alibaba的一个图片切换效果，感觉不错，想拿来用用。但代码一大堆的，看着昏，还是自己来吧。由于有了做图片滑动展示效果的经验，做这个就容易得多了。首先需要一个容器，设置它的overflow为hidden，position为relative；
容器里面还要一个滑动对象，设置它的position为absolute；
在initialize()函数里初始化一些属性。
在切换之前先执行Start()函数，进行相关设置，
主要是设置Index属性(索引)和_target属性(目标值)：

复制代码代码如下:
例子里完整的测试代码：

复制代码代码如下:

点击运行可以看到效果:

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JavaScript 图片切换展示效果</title>
</head>
<body>
<style type="text/css">
.container, .container *{margin:0; padding:0;}
.container{width:408px; height:168px; overflow:hidden;}
.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>
<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>
<div>
<input id="idStop" type="button" value=" 停止自动 " />
<input id="idStart" type="button" value=" 开始自动 " />
<input id="idPre" type="button" value=" <- 上一个 " />
<input id="idNext" type="button" value=" 下一个 -> " />
切换速度：
<input id="idFast" type="button" value=" + 加 速 " />
<input id="idSlow" type="button" value=" - 减 速 " />
停顿时间：
<input id="idAdd" type="button" value=" + 加时间 " />
<input id="idReduce" type="button" value=" - 减时间 " />
<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>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

js鼠标、键盘事件实例代码 Javascript 小技巧全集

Javascript 中的 JavaScript 图片切换展示效果alibaba拓展版

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