Question

javascript无缝滚动问题，请网上的朋友给我看看代码那里出错了。

<script>
window.onload=function ()
{
var oDiv=document.getElementById('div1');
var oUl=oDiv.getElementsByTagName('ul')[0];
var aLi=oUl.getElementsByTagName('li');
var speed=-2;

oUl.innerHTML=oUl.innerHTML+oUl.innerHTML;
oUl.style.width=aLi[0].offsetWidth*aLi.length+'px';
function move()
{
if(oUl.offsetLeft<-oUl.offsetWidth/2)
{
oUl.style.left='0';
}

if(oUl.offsetLeft>0)
{
oUl.style.left=oUl.offsetWidth/2+'px';
}
oUl.style.left=oUl.offsetLeft+speed+'px';
}
var timer=setInterval(move,30);
oDiv.onmouseover=function ()
{
clearInterval(timer);
};
oDiv.onmouseout=function ()
{
timer=setInterval(move,30);
};
document.getElementsByTagName('a')[0].onclick=function(){
speed=-2;
};
document.getElementsByTagName('a')[1].onclick=function(){
speed=2;
};
};
</script>

Answer 1

if(oUl.offsetLeft>0)
{
oUl.style.left = -oUl.offsetWidth/2+'px';
}