图片banner变换纯js特效，兼容firefox，适合做普通banner图片轮换特效
演示地址
http://www.dayanmei.com/demo/image_banner_v1/index.htm
源文件下载
http://www.dayanmei.com/download.php?filename=image_banner_01.rar
下面是代码
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="icon" href="/favicon.ico" type="image/x-icon" />
<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
<title></title>
<meta name="Description" content="" />
<meta content="" name="Keywords" />
<link rel="stylesheet" rev="stylesheet" href="" type="text/css" media="all" />
</head>
<body>
<script>
var links = new Array();
links[1] = "http://www.aspxhome.com";
links[2] = "hhttp://www.aspxhome.com";
links[3] = "http://www.aspxhome.com";
links[4] = "http://www.aspxhome.com";
var imgs = new Array();
for(var n = 1; n <= 5; n++) imgs[n] = new Image();
imgs[1].src = "http://www.aspxhome.com/article/UploadPic/200711/16/20071116164358614.gif";
imgs[2].src = "http://www.aspxhome.com/article/UploadPic/200711/16/2007111616442135.jpg";
imgs[3].src = "http://www.aspxhome.com/article/UploadPic/200711/16/2007111616442329.jpg";
imgs[4].src = "http://www.aspxhome.com/article/UploadPic/200711/16/2007111616443241.jpg";
var tits = new Array();
tits[1] ="百度统计";
tits[2] = "联盟杯摄影师大赛";
tits[3] = "百度行业报告";
tits[4] = "联盟志";
var imgwidth = 550;//图片宽度
var imgheight = 134;//图片宽度
var str = "<style type='text/css'>";
str += "#imgnv#imgnv div";
str += "#imgnv div.on,#imgnv div.off";
str += "#imgnv div.on";
str += "#imgnv div.off";
str += "#titnv";
str += "</style>";
str += "<div style='position:relative'>";
str += "<div><a id='dlink' href='" + links[1] + "' target='_blank'><img id='dimg' src='" + imgs[1].src + "' border='0' width='" + imgwidth + "' height='"+imgheight+"' style='filter:Alpha(opacity=100)' onmouseover='Pause(true)' onmouseout='Pause(false)'></a></div>";
//修改点1：循环添加内层div内容以增加个数
str += "<div id='imgnv'><div id='it1' class='on' onmouseover='ImgSwitch(1, true)' onmouseout='Pause(false)'>1</div><div id='it2' class='off' onmouseover='ImgSwitch(2, true)' onmouseout='Pause(false)'>2</div><div id='it3' class='on' onmouseover='ImgSwitch(3, true)' onmouseout='Pause(false)'>3</div><div id='it4' class='off' onmouseover='ImgSwitch(4, true)' onmouseout='Pause(false)'>4</div></div>";
str += "<div id='titnv'><b>" + tits[1] + "</b></div>";
str += "</div>";
document.write(str);
var oi = document.getElementById("dimg");
var pause = false;
var curid = 1;
var lastid = 1;
var sw = 1;
var opacity = 100;
var speed = 15;
var delay = (document.all)? 400:700;
function SetAlpha(){
if(document.all){
if(oi.filters && oi.filters.Alpha) oi.filters.Alpha.opacity = opacity;
}else{
oi.style.MozOpacity = ((opacity >= 100)? 99:opacity) / 100;
}
}
function ImgSwitch(id, p){
if(p){
pause = true;
opacity = 100;
SetAlpha();
}
oi.src = imgs[id].src;
document.getElementById("dlink").href = links[id];
document.getElementById("it" + lastid).className = "off";
document.getElementById("it" + id).className = "on";
document.getElementById("titnv").innerHTML = "<b>" + tits[id] + "</b>";
curid = lastid = id;
}
function ScrollImg(){
if(pause && opacity >= 100) return;
if(sw == 0){
opacity += 2;
if(opacity > delay){ opacity = 100; sw = 1; }
}
if(sw == 1){
opacity -= 3;
if(opacity < 10){ opacity = 10; sw = 3; }
}
SetAlpha();
if(sw != 3) return;
sw = 0;
curid++;
//修改点2：这里的4也是个数
if(curid > 4) curid = 1;
ImgSwitch(curid, false);
}
function Pause(s){
pause = s;
}
function StartScroll(){
setInterval(ScrollImg, speed);
}
function CheckLoad(){
if (imgs[1].complete == true && imgs[2].complete == true) {
clearInterval(checkid);
setTimeout(StartScroll, 2000);
}
}
var checkid = setInterval(CheckLoad, 10);
</script>
</body>
</html>
本文收集自： http://www.aspxhome.com
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