变化的多幅图片

下面为效果显示

脚本说明:
把如下代码加入<body>区域中
<script language="JavaScript1.2">

//Drop-in slideshow- By Dynamic Drive
//For full source code and more DHTML scripts, visit http://www.dynamicdrive.com
//This credit MUST stay intact for use

var slideshow_width=140 //SET SLIDESHOW WIDTH (set to largest image's width if multiple dimensions exist)
var slideshow_height=225 //SET SLIDESHOW HEIGHT (set to largest image's height if multiple dimensions exist)
var pause=3000 //SET PAUSE BETWEEN SLIDE (3000=3 seconds)

var dropimages=new Array()
//SET IMAGE PATHS. Extend or contract array as needed
dropimages[0]="photo1.jpg"
dropimages[1]="photo2.jpg"
dropimages[2]="photo3.jpg"

////NO need to edit beyond here/////////////

var preloadedimages=new Array()
for (p=0;p<dropimages.length;p++){
preloadedimages[p]=new Image()
preloadedimages[p].src=dropimages[p]
}

var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1
var dom=document.getElementById&&navigator.userAgent.indexOf("Opera")==-1

if (ie4||dom)
document.write('<div style="position:relative;width:'+slideshow_width+';height:'+slideshow_height+';overflow:hidden"><div id="canvas0" style="position:absolute;width:'+slideshow_width+';height:'+slideshow_height+';top:-'+slideshow_height+'"></div><div id="canvas1" style="position:absolute;width:'+slideshow_width+';height:'+slideshow_height+';top:-'+slideshow_height+'"></div></div>')
else
document.write('<img name="defaultslide" src="'+dropimages[0]+'">')

var curpos=slideshow_height*(-1)
var degree=10
var curcanvas="canvas0"
var curimageindex=0
var nextimageindex=1

function movepic(){
if (curpos<0){
curpos=Math.min(curpos+degree,0)
tempobj.style.top=curpos
}
else{
clearInterval(dropslide)
nextcanvas=(curcanvas=="canvas0")? "canvas0" : "canvas1"
tempobj=ie4? eval("document.all."+nextcanvas) : document.getElementById(nextcanvas)
tempobj.innerHTML='<img src="'+dropimages[nextimageindex]+'">'
nextimageindex=(nextimageindex<dropimages.length-1)? nextimageindex+1 : 0
setTimeout("rotateimage()",pause)
}
}

function rotateimage(){
if (ie4||dom){
resetit(curcanvas)
var crossobj=tempobj=ie4? eval("document.all."+curcanvas) : document.getElementById(curcanvas)
crossobj.style.zIndex++
var temp='setInterval("movepic()",50)'
dropslide=eval(temp)
curcanvas=(curcanvas=="canvas0")? "canvas1" : "canvas0"
}
else
document.images.defaultslide.src=dropimages[curimageindex]
curimageindex=(curimageindex<dropimages.length-1)? curimageindex+1 : 0
}

function resetit(what){
curpos=slideshow_height*(-1)
var crossobj=ie4? eval("document.all."+what) : document.getElementById(what)
crossobj.style.top=curpos}

function startit(){
var crossobj=ie4? eval("document.all."+curcanvas) : document.getElementById(curcanvas)
crossobj.innerHTML='<img src="'+dropimages[curimageindex]+'">'
rotateimage()
}

if (ie4||dom)
window.onload=startit
else
setInterval("rotateimage()",pause)

</script>