javascript 淡入式图片幻灯切换效果(带说明的)

时间：2010-10-11 编辑：简简单单来源：一聚教程网

提示：您可以先修改部分代码再运行

<!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>带说明的淡入式图片幻灯切换效果果</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">

<style type="text/<a href="http://www.111com.net/cssdiv/css.html" target="_blank">css</a>">
#fader{position:relative;overflow:hidden;}
#fader li{position:absolute;left:0;top:0;}
ul,li{list-style:none;margin:0;padding:0;}
img{display:block;}
.fader-nav{display:inline-block;margin-right:8px;color:#fff;padding:2px 6px;background:#333;border:1px solid #fff;font-family:Tahoma;font-weight:bold;font-size:12px;cursor:pointer;}
.fader-cur-nav{display:inline-block;margin-right:8px;color:#fff;padding:2px 6px;background:#ff7a00;border:1px solid #fff;font-family:Tahoma;font-weight:bold;font-size:12px;cursor:pointer;}
</style>
<script type="text/javascript">
var Hongru={};
function H$(id){return document.getElementById(id)}
function H$$(c,p){return p.getElementsByTagName(c)}
Hongru.fader = function(){
	function init(anchor,options){
		this.anchor = anchor;
		var wp = H$(options.id),
			ul = H$$('ul',wp)[0],
			li = this.li = H$$('li',ul);
		this.index = options.position?options.position:0;
		this.a = options.auto?options.auto:2;
		this.cur = this.z = 0;
		this.l = li.length;
		this.img = [];
		for(var k=0;k<this.l;k++){
			this.img.push(H$$('img',this.li[k])[0]);
		}
		this.curC = options.curNavClass?options.curNavClass:'fader-cur-nav';
		nav_wp = document.createElement('div');
		nav_wp.id = 'fader-nav';
		nav_wp.style.cssText = 'position:absolute;right:0;bottom:0;padding:8px 0;';
		var alt = this.alt = document.createElement('p');
		for(var i=0;i<this.l;i++){
			this.li[i].o = 100;
			//setOpacity(this.li[i],this.li.o);
			this.li[i].style.opacity = this.li[i].o/100;
			this.li[i].style.filter = 'alpha(opacity='+this.li[i].o+')';
			//绘制控制器
			var nav = document.createElement('a');
			nav.className = options.navClass?options.navClass:'fader-nav';
			nav.innerHTML = i+1;
			nav.onclick = new Function(this.anchor+'.pos('+i+')');
			nav_wp.appendChild(nav);
		}
		wp.appendChild(alt);		
		wp.appendChild(nav_wp);
		this.textH = nav_wp.offsetHeight;
				alt.style.cssText = 'color:#fff;font-size:12px;padding-left:20px;margin:0;position:absolute;left:0;bottom:0;overflow:hidden;width:100%;background:#000;opacity:0.7;filter:alpha(opacity=70);';
				alt.style.px';
		this.pos(this.index);
	}
	init.prototype={
		auto:function(){
			this.li.a = setInterval(new Function(this.anchor+'.move(1)'),this.a*1000); 
		},
		move:function(i){
			var n = this.cur+i;
			var m = i==1?n==this.l?0:n:n<0?this.l-1:n;
			this.pos(m);
		},
		pos:function(i){
			clearInterval(this.li.a);
			clearInterval(this.li[i].f);
			var curLi = this.li[i];
			this.z++;
			curLi.style.zIndex = this.z;
			this.alt.style.zIndex = this.z+1;
			nav_wp.style.zIndex = this.z+2;
			this.li.a=false;//这句话是必要的
			this.cur = i;
			//setOpacity(curLi[i],0);
			if(this.li[i].o>=100){
				this.li[i].o = 0;
				curLi.style.opacity = 0;
				curLi.style.filter = 'alpha(opacity=0)';
				this.alt.style.;
			}
			for(var x=0;x<this.l;x++){
				nav_wp.getElementsByTagName('a')[x].className = x==i?this.curC:'fader-nav';
				}
			this.alt.innerHTML = this.img[i].alt;
			this.li[i].f = setInterval(new Function(this.anchor+'.fade('+i+')'),20);
		},
		fade:function(i){
		var p=this.li[i];
			if(p.o>=100){
				clearInterval(p.f);
				if(!this.li.a){//一定要在这里做个是否已经clearInterval的判断，要不然在快速点击的时候会导致图片不停地闪
					this.auto();
				}
			}
			else{
				p.o+=5;
				//setOpacity(this.li[i],this.li[i].o);
				p.style.opacity = p.o/100;
				p.style.filter = 'alpha(opacity='+p.o+')';
				this.alt.style.px';
			}
		}
	};
	return {init:init};
}();
</script>
</head>
<body>

<div id="fader">
	<ul>
		<li><img  src="https://img.111com.net/get_pic/2010/03/2010101112094475.jpg" alt="图片一"></li>
		<li><img  src="https://img.111com.net/get_pic/2010/03/2010101112095180.jpg" alt="图片二"></li>
		<li><img  src="https://img.111com.net/get_pic/2010/03/20101011120957175.jpg" alt="图片三"></li>
		<li><img  src="https://img.111com.net/get_pic/2010/03/20101011121003220.jpg" alt="图片四"></li>
		<li><img  src="https://img.111com.net/get_pic/2010/03/20101011121010475.jpg" alt="图片五"></li>
	</ul>
</div>
<script type="text/javascript">
var fader = new Hongru.fader.init('fader',{
	id:'fader'
});
</script>
</body>
</html>

提示：您可以先修改部分代码再运行

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