缓冲动画鼠标放上拿开反复6到7次以后程序执行就出问题，大家有没遇到这个问题
<script>
window.onload = function(){
var oDiv = document.getElementById("div1");
oDiv.onmouseover = function(){
startMove(0);
}
oDiv.onmouseout = function(){
startMove(-200);
}
}
var timer = null;
function startMove(iTarget){
clearInterval(timer);
var oDiv = document.getElementById("div1");
var speed = (iTarget-oDiv.offsetLeft)/20;
speed = speed>0?Math.ceil(speed):Math.floor(speed);
timer = setInterval(function(){
if(oDiv.offsetLeft==iTarget){
clearInterval(timer);
}
else{
oDiv.style.left = oDiv.offsetLeft+speed+"px";
}
},30)
}
</script>
