代码简介：
很常见的一款基于JS的图片幻灯片切换特效，与其它幻灯片不同之处是这款代码带有渐变效果，给人的感觉很舒服，像一个相册播放器一样，你只用将图片按顺序命名存放到指定目录，它会自动检测并播放。
代码内容：
View Code
<!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>一款实用的JavaScript图片幻灯片代码 - www.webdm.cn</title>
<style type="text/css">
<!--
body { font-size:12px;
}
input {
border-right: #7b9ebd 1px solid;
padding-right: 2px;
border-top: #7b9ebd 1px solid;
padding-left: 2px;
font-size: 12px;
filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr=#ffffff, EndColorStr=#cecfde);
border-left: #7b9ebd 1px solid;
cursor: hand;
color: black;
padding-top: 2px;
border-bottom: #7b9ebd 1px solid;
}
.img {
filter:alpha(opacity=1,enabled=1) blendtrans(duration=1);
border:1px solid #CCCCCC;
}
-->
</style>
<script language="javascript">
var l=0;
var sum=0;
var _c = 0;
var _i = 0;
var _v = 0;
var _l = 0;
var _fi = 0;
var _sf = 3000;
var _html = null;
var _image = null;
var _mycars= new Array();
var _w = new Array();
var _h = new Array();
var imgs=new Array();
var limg=new Array();
/* 渐变 */
function transImg(enable){
document.getElementById("showimg").filters.blendtrans.Apply();
document.getElementById("showimg").filters[0].enabled=enable;
document.getElementById("showimg").filters.blendtrans.Play();
}
/* 加载图片 */
function chk(){
l--;
document.getElementById("rotatorPlayer").innerHTML='<img src='+limg[0].src+'><br><br>' + '照片已加载：' + parseInt
(((sum-
l)*100/sum)).toString() + '%'
if (l==0){
adRotator.play();
document.getElementById('stops').disabled='';
document.getElementById('next').disabled='';
}
}
if (document.images){
limg[0]=new Image();
limg[0].src="http://www.webdm.cn/images/loading.gif";
for(var i=0;i<10;i++)
{
imgs[i]=new Image();
imgs[i].src="http://www.webdm.cn/images/wall"+parseInt(i+1)+".jpg";
}
}
function adRotator() {}
function adRotator.add(p,w,h)
{
_mycars[_c] = p;
_w[_c] = w;
_h[_c] = h;
_c = _c + 1;
}
/* 播放配置 */
function adRotator.loads()
{
if (_i < _mycars.length && _l < 1)
{
_html = '<img id="showimg" src="' + _mycars[_i] + '" width="' + _w[_i] + '" height="' + _h[_i] + '" class="img">'
if (_v < 1)
{
document.getElementById('image').value = _html + ',' + _i;
document.getElementById('rotatorPlayer').innerHTML = _html;
transImg(0);
_i = _i + 1;
document.getElementById('backs').disabled='';
transImg(1);
transImg(0);
window.setTimeout("adRotator.loads("+_i+")",_sf);
}
}
else
{
_html = '<img id="showimg" src="' + _mycars[_i] + '" width="' + _w[_i] + '" height="' + _h[_i] + '" class="img">'
document.getElementById('image').value = _html + ',' + _i;
document.getElementById('rotatorPlayer').innerHTML = _html;
transImg(0);
transImg(1);
transImg(0);
}
if (_i+1 > _mycars.length)
{
document.getElementById('stops').disabled='True';
document.getElementById('play').disabled='';
document.getElementById('backs').disabled='';
document.getElementById('next').disabled='True';
_i = 0;
_v = 1;
}
}
/* 播放 */
function adRotator.play()
{
_v = 0;
_l = 0;
adRotator.loads();
}
/* 下一张 */
function adRotator.next()
{
_l = 1;
if(_i+1 < _mycars.length)
{
_i = _i + 1;
document.getElementById('play').disabled='';
document.getElementById('stops').disabled='True';
document.getElementById('backs').disabled='';
adRotator.loads();
}
else
{
document.getElementById('next').disabled='True';
}
}
/* 上一张 */
function adRotator.backs()
{
_l = 1;
if(_i-1 < 0)
{
document.getElementById('backs').disabled='True';
}
else
{
_i = _i - 1;
document.getElementById('play').disabled='';
document.getElementById('stops').disabled='True';
document.getElementById('next').disabled='';
adRotator.loads();
}
}
/* 间隔时间 */
function adRotator.set()
{
var _sfc = document.getElementById('second').value;
if (isInteger(_sfc))
{
_sf = _sfc * 1000;
}
else
{
alert('只能输入数字！');
document.getElementById('second').value=1;
document.getElementById('second').select();
}
}
/* 字符检测 */
function isInteger(str)
{
var regu = /^[-]{0,1}[0-9]{1,}$/;
return regu.test(str);
}
/* 暂停 */
function adRotator.stops()
{
_v = 1;
}
/* 添加图片 */
for (var i=0;i<imgs.length;i++)
{
adRotator.add(imgs[i].src,400,300);
}
</script>
</head>
<body>
<table width="420" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td align="center">
<div id="rotatorPlayer" style="text-align:center"><img src="/jscss/demoimg/loading.gif"><br><br>照片已加载：0%</div>
<br><br>
<input type="button" name="play" value="开始播放" onClick="adRotator.play();this.disabled='true';document.getElementById
('stops').disabled=''" disabled="True"/>
<input type="button" name="stops" value="暂停" onClick="adRotator.stops();this.disabled='true';document.getElementById
('play').disabled=''" disabled="True"/>
<input type="button" name="backs" value="上一张" onClick="adRotator.backs();" disabled="True"/>
<input type="button" name="next" value="下一张" onClick="adRotator.next();" disabled="True"/>
<input type="text" id="second" value="3" size="3" maxlength="2">
秒
<input type="button" value="配置时间" onClick="adRotator.set()" />
<br><br>
<input name="image" type="text" size="65"/>
</td>
</tr>
</table>
<script language="javascript">
sum=l=imgs.length;
for (var i=0;i<l;i++){
imgs[i].onload=chk;
imgs[i].onerror=chk;//无论图片是否加载成功，都执行指定方法
}
</script>
</body>
</html>
<br />
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代码来自：http://www.webdm.cn/webcode/46e1648b-f6dc-46e4-919d-f498aa3f9848.html