求一段简单JavaScript的图片轮播演示代码（也就是几张图片轮换交替现实）主要是求图片轮播的实现思路,jquery的代码就不要了，只要JavaScript的代码，求高手帮助，谢谢
求一段简单JavaScript的图片轮播演示代码（也就是几张图片轮换交替现实）主要是求图片轮播的实现思路,jquery的代码就不要了，只要JavaScript的代码，求高手帮助，谢谢
求一段简单JavaScript的图片轮播演示代码（也就是几张图片轮换交替现实）主要是求图片轮播的实现思路,jquery的代码就不要了，只要JavaScript的代码，求高手帮助，谢谢
<script type="text/javascript">
var settime = function () {
var name = document.getElementById("getvalue").value;
var firstKey = name.substring(0, 1);
var lastAllKey = name.substring(1);
document.getElementById("getvalue").value = lastAllKey + firstKey;
alert(document.getElementById("getvalue").value);
};
setInterval(settime, 500);
</script>
其实就和一串字轮播一样
var arr=new Array();
arr[1]="";//放图片地址
arr[2]="";
arr[3]="";
var num=0;
setInterval(turnpic,4000); //每隔4秒转换图片
function turnpic(){
idsrc=document.getElementById("id1");
if(num==arr.length-1)
num=0;
else
num+=1;
idsrc.src=arr[num];
}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>向上下左右不间断无缝滚动图片的效果(兼容火狐和IE)</title></head><body><div id="colee" style="overflow:hidden;height:253px;width:410px;"><div id="colee1"><p><img src="/jscss/demoimg/200907/bg3.jpg"></p><p><img src="/jscss/demoimg/200907/bg3.jpg"></p><p><img src="/jscss/demoimg/200907/bg3.jpg"></p><p><img src="/jscss/demoimg/200907/bg3.jpg"></p><p><img src="/jscss/demoimg/200907/bg3.jpg"></p><p><img src="/jscss/demoimg/200907/bg3.jpg"></p></div><div id="colee2"></div></div><script>var speed=30;var colee2=document.getElementById("colee2");var colee1=document.getElementById("colee1");var colee=document.getElementById("colee");colee2.innerHTML=colee1.innerHTML; //克隆colee1为colee2function Marquee1(){//当滚动至colee1与colee2交界时if(colee2.offsetTop-colee.scrollTop<=0){ colee.scrollTop-=colee1.offsetHeight; //colee跳到最顶端 }else{ colee.scrollTop++}}var MyMar1=setInterval(Marquee1,speed)//设置定时器//鼠标移上时清除定时器达到滚动停止的目的colee.onmouseover=function() {clearInterval(MyMar1)}//鼠标移开时重设定时器colee.onmouseout=function(){MyMar1=setInterval(Marquee1,speed)}</script>