各位慕友，关于【间隙滚动】的onmouseover和onmouseout加速滚动问题，哪位幕友帮忙看看？？
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#box{
width: 335px;
height: 144px;
margin: 0 auto;
border: 1px solid #ccc;
overflow: hidden;
}
#box a{
display: block;
text-indent: 15px;
height: 36px;
line-height: 36px;
text-decoration: none;
color: #333;
}
#box a:hover{color: #f00;}
<script type="text/javascript">
window.onload=function(){
window.box = getDom('box');
window.aHeight=36;//滚动高度,item(a)的高度
box.innerHTML += box.innerHTML;// 克隆一份
box.scrollTop = 0;
window.speed = 50;
window.delay = 1000;
window.timer=null;
setTimeout('startMove()',delay);//仅执行一次
box.onmouseover=function(){
clearInterval(timer);
};
box.onmouseout=function(){
timer=setInterval('scrollUp()',speed); ------------------------------------------加速滚动
};
}
function startMove(){
box.scrollTop ++;
timer=setInterval('scrollUp()',speed);//每隔指定的时间就执行一次
}
function scrollUp(){
if(box.scrollTop % aHeight ==0){
clearInterval(timer);
setTimeout('startMove()',delay);
}else{
box.scrollTop ++;
if(box.scrollTop >= box.scrollHeight/2) {
box.scrollTop = 0;
}
}
}
function getDom(id){
return document.getElementById(id);
}
</script>
