超酷广告图片轮换

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<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="http://www.baron.com.cn/javascript/picture/120021114.gif" width="438" height="278"></div>
        <div class=dynPage id=dynPage2><img src="http://www.baron.com.cn/javascript/picture/220021114.gif" width="438" height="278"></div>
        <div class=dynPage id=dynPage3><img src="http://www.baron.com.cn/javascript/picture/320021114.gif" width="438" height="278"></div>
        <div class=dynPage id=dynPage4><img src="http://www.baron.com.cn/javascript/picture/420021114.gif" width="438" height="278"></div>
      </div>