超酷广告图片轮换

下面为效果显示

脚本说明:
把如下代码加入<body>区域中
<style type=text/css>
#divScroller1 {	HEIGHT: 278px; OVERFLOW: hidden; POSITION: absolute; WIDTH: 438px; Z-INDEX: 9; visbility: visible}
.dynPage {	COLOR: black; FONT-FAMILY: arial,helvetica,sans-serif; FONT-SIZE: 12px; LEFT: 0px; POSITION: absolute; TOP: 0px; VISIBILITY: hidden; Z-INDEX: 10}
</style>
<script language=JavaScript type=text/javascript>
function lib_bwcheck(){ //Browsercheck (needed)
	this.ver=navigator.appVersion
	this.agent=navigator.userAgent
	this.dom=document.getElementById?1:0
	this.opera5=this.agent.indexOf("Opera 5")>-1
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0; 
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
	this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
	this.ie=this.ie4||this.ie5||this.ie6
	this.mac=this.agent.indexOf("Mac")>-1
	this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
	this.ns4=(document.layers && !this.dom)?1:0;
	this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5)
	return this
}
var bw=new lib_bwcheck()

/*** variables to configure... ***/

var numScrollPages = 4         //Set the number of pages (layers) here.
var transitionOut = 1;         //The 'out' effect... 0= no effect, 1= fade
var transitionIn = 1;          //The 'in' effect... 0= no effect, 1= fade, 2= slide
var slideAcceleration = 0.2;   //If you use the slide animation, set this somewhere between 0 and 1.

if(document.layers){ //NS4 resize fix...
	scrX= innerWidth; scrY= innerHeight;
	onresize= function(){if(scrX!= innerWidth || scrY!= innerHeight){history.go(0)} }
}
function scrollerobj(obj,nest){
	nest = (!nest)?"":'document.'+nest+'.'
	this.elm = bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):document.getElementById(obj)
	this.css = bw.ns4?this.elm:this.elm.style
	this.doc = bw.ns4?this.elm.document:document
	this.obj = obj+'scrollerobj'; eval(this.obj+'=this')
	this.x = (bw.ns4||bw.opera5)?this.css.left:this.elm.offsetLeft
	this.y = (bw.ns4||bw.opera5)?this.css.top:this.elm.offsetTop
	this.w = (bw.ie4||bw.ie5||bw.ie6||bw.ns6)?this.elm.offsetWidth:bw.ns4?this.elm.clip.width:bw.opera5?this.css.pixelWidth:0
	this.h = (bw.ie4||bw.ie5||bw.ie6||bw.ns6)?this.elm.offsetHeight:bw.ns4?this.elm.clip.height:bw.opera5?this.css.pixelHeight:0
}
//object methods...
scrollerobj.prototype.moveTo = function(x,y){
	if(x!=null){this.x=x; this.css.left=x}
	if(y!=null){this.y=y; this.css.top=y}
}
scrollerobj.prototype.moveBy = function(x,y){this.moveTo(this.x+x,this.y+y)}
scrollerobj.prototype.hideIt = function(){this.css.visibility='hidden'}
scrollerobj.prototype.showIt = function(){this.css.visibility='visible'}

/****************************************************************/

//============ 变换设置 ==========
function startshow(num){
	if (num == 1)  
		{ num = 2; }
	else 
		if (num == 2) 
			{ num = 3; }
		else
			if (num == 3) 
				{ num = 4; }
			else
				if (num == 4) 
					{ num = 1; }
	setTimeout('activate('+num+')',1000);
}

scrollerobj.prototype.blend= function(vis, fn){
	if (bw.ie5||bw.ie6 && !bw.mac) {
		if (vis=='visible') this.css.filter= 'blendTrans(duration=0.9)';
		else this.css.filter= 'blendTrans(duration=0.6)';
		this.elm.onfilterchange = function(){ eval(fn); };
		this.elm.filters.blendTrans.apply();
		this.css.visibility= vis;
		this.elm.filters.blendTrans.play();
	}
	else if (bw.ns6 || bw.ie&&!bw.mac){
		this.css.visibility= 'visible';
		vis=='visible' ? this.fadeTo(100, 7, 40, fn) : this.fadeTo(0, 9, 40, fn);
	}
	else {
		this.css.visibility= vis;
		eval(fn);
	}
};

var pageslidefadeLoaded = 0;
function initPageSlideFade(){
	scroller1 = new scrollerobj('divScroller1');
	
	pages = new Array();
	pages[0] = null;
	for (var i=1; i<=numScrollPages; i++){
		pages[i] = new scrollerobj('dynPage'+i, 'divScroller1');
		pages[i].moveTo(0,0);
	}
	bw.opacity = ( bw.ie && !bw.ie4 && navigator.userAgent.indexOf('Windows')>-1 ) || bw.ns6
	if (bw.ie5||bw.ie6 && !bw.mac) pages[1].css.filter= 'blendTrans(duration=0.6)'; // Loads the windows 9.x filters module.
	activateContinue(1);

//if (bw.ie) for(var i=0;i<document.links.length;i++) document.links[i].onfocus=document.links[i].blur;
	pageslidefadeLoaded = 1;
}
//if the browser is ok, the script is started onload..
if(bw.bw && !pageslidefadeLoaded) onload = initPageSlideFade;
</script>
      <div id=divScroller1> 
        <div class=dynPage id=dynPage1><img src="120021114.gif" width="438" height="278"></div>
        <div class=dynPage id=dynPage2><img src="220021114.gif" width="438" height="278"></div>
        <div class=dynPage id=dynPage3><img src="320021114.gif" width="438" height="278"></div>
        <div class=dynPage id=dynPage4><img src="420021114.gif" width="438" height="278"></div>
      </div>