图片轮换类，IE7、OP、FF、Chrome测试通过
2010年05月23日
by 江小邪
2 comments
<html>
<head><title>新闻图片轮换类</title>
<script type=”text/javascript”>
var fs = new FadeSlideClass();
fs.Width = 430;
fs.Height = 250;
fs.AddImage(“http://www.5bay.cn/Test/Image/001.jpg“, “#”, “新闻标题”);
fs.AddImage(“http://www.5bay.cn/Test/Image/002.jpg“, “#”, “新闻标题”);
fs.AddImage(“http://www.5bay.cn/Test/Image/003.jpg“, “//g.cn”, “去Google”);
fs.AddImage(“http://www.5bay.cn/Test/Image/004.jpg“, “#”, “新闻标题”);
fs.AddImage(“http://www.5bay.cn/Test/Image/005.jpg“, “#”, “新闻标题”);
fs.RenderTo(“divStage”);
/* 以下代码构造轮换类 */
function FadeSlideClass()
{
this.Width = 450;
this.Height = 300;
this.BorderColor = “#ddd”;
this.CurrentColor = “green”;
this.Delay = 5000;
var divContainer = document.createElement(“div”);
var divImage = document.createElement(“div”);
var ulList = document.createElement(“ul”);
var me = this;
var arrImg = new Array;
this.Tag = divContainer;
this.AddImage = function(strImageUrl, strLink, strTitle)
{
arrImg.push(arguments);
}
this.RenderTo = function(container)
{
if(typeof container == “string”) container = document.getElementById(container) || container;
if(typeof container == “string”) return setTimeout(function(){ me.RenderTo(container); }, 100);
if(!arrImg.length) throw new Error(“尚未添加图片。”);
var cssFloat = typeof ulList.style.cssFloat == “string” ? “cssFloat” : “styleFloat”;
divContainer.style.width = this.Width + “px”;
divContainer.style.height = this.Height + “px”;
divImage.style.width = Math.round(this.Width * (arrImg.length – 1) / arrImg.length) + “px”;
divImage.style.height = this.Height + “px”;
divImage.style[cssFloat] = “left”;
ulList.style.width = (this.Width – parseInt(divImage.style.width)) + “px”;
ulList.style.height = this.Height + “px”;
ulList.style.margin = “0px”;
ulList.style.padding = “0px”;
ulList.style[cssFloat] = “left”;
divContainer.style.overflow = “hidden”;
divImage.style.overflow = “hidden”;
ulList.onmouseover = function(){ clearTimeout(me.Handler) };
ulList.onmouseout = function(){ AutoPlay(); };
InitImage(2);
InitList(arrImg.length);
container.appendChild(divContainer);
divContainer.appendChild(divImage);
divContainer.appendChild(ulList);
LiMouseOver.call(ulList.firstChild);
AutoPlay();
this.AddImage = function(){ throw new Error(“该方法已过时。”); }
}
this.Display = function(imgThumb)
{
var img = divImage.lastChild.lastChild;
var opa = new OpacityClass(img);
opa.Set(20);
img.src = imgThumb.src;
img.parentNode.href = imgThumb.parentNode.href;
img.parentNode.title = imgThumb.parentNode.title;
clearInterval(ulList.Handler);
ulList.Handler = setInterval(function(){
if(opa.Add(5) >= 100)
{
divImage.firstChild.lastChild.src = img.src;
clearInterval(ulList.Handler);
}
}, 25);
}
function LiMouseOver()
{
if(this == ulList.oldLi) return;
if(ulList.oldLi) ulList.oldLi.style.borderColor = me.BorderColor;
this.style.borderColor = me.CurrentColor;
ulList.oldLi = this;
me.Display(this.firstChild.firstChild);
}
function InitImage(count)
{
if(–count) arguments.callee(count);
var a = document.createElement(“a”);
a.target = “_blank”;
divImage.appendChild(a).style.position = “absolute”;
var img = new Image;
img.width = parseInt(divImage.style.width);
img.height = me.Height;
img.border = 0;
if(!a.appendChild(img).filters) img.style.opacity = 1;
else img.style.filter = “alpha(opacity=100)”;
}
function InitList(count)
{
if(–count) InitList(count);
var isIeNoDtd = document.compatMode != “CSS1Compat” && /msie/i.test(navigator.userAgent);
var data = arrImg[count];
var thumbWidth = parseInt(ulList.style.width);
var thumbHeight = Math.round(me.Height / arrImg.length);
var li = document.createElement(“li”);
li.style.overflow = “hidden”;
li.style.width = (isIeNoDtd ? thumbWidth : thumbWidth – 4) + “px”;
li.style.height = (isIeNoDtd ? thumbHeight : thumbHeight – 4) + “px”;
li.style.borderWidth = “2px”;
li.style.borderStyle = “solid”;
li.style.borderColor = me.BorderColor;
var a = document.createElement(“a”);
a.target = “_target”;
a.href = data[1];
a.title = data[2];
var img = new Image;
img.border = 0;
img.width = thumbWidth;
img.height = thumbHeight;
img.src = data[0];
img.style.verticalAlign = “top”;
img.style.margin = “-2px”;
a.appendChild(img);
li.appendChild(a);
li.style.listStyle = “none”;
li.onmouseover = LiMouseOver;
ulList.appendChild(li);
}
function AutoPlay()
{
me.Handler = setTimeout(function()
{
LiMouseOver.call(ulList.oldLi.nextSibling || ulList.firstChild);
AutoPlay();
}, me.Delay);
}
function OpacityClass(tag)
{
var isFilter = !!tag.filters;
var obj = isFilter ? tag.filters.alpha : tag.style;
this.Set = function(value)
{
obj.opacity = isFilter ? value : value / 100;
return this;
}
this.Add = function(value)
{
var opa = isFilter ? obj.opacity : obj.opacity * 100;
opa += value;
if(opa > 100) opa = 100;
obj.opacity = isFilter ? opa : opa / 100;
return this;
}
this.valueOf = function()
{
return isFilter ? obj.opacity : obj.opacity * 100;
}
}
}
</script>
</head>
<body>
<div id=”divStage”></div>
</body>
</html>