图片轮换类，IE7、OP、FF、Chrome测试通过

Posted by 江小邪 on 2010年05月23日 Leave a comment Go to 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>