怎么给datalist设定滚动时间
function top() {
        var speed = 40;//设置滚动速度
        demo2.innerHTML = demo1.innerHTML//复制demo1为demo2

        function Marquee() {
            if (demo1.offsetWidth - demo.scrollLeft <= 0)//当滚动至demo1与demo2交界时
                demo.scrollTop = 0  //demo跳到最左端
            else
                demo.scrollTop++
        }
}

求教！
------解决方案--------------------
里面加个定时器，setTim

<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colee2



function 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)}