组合透明度变换的时候，单个第一次变换时候速度很快后面又正常怎么回事
//这是JS代码部分
<script type="text/javascript">
window.onload=function(){
var i=document.getElementsByTagName("li");
for(var j=0;j<i.length;j++)
{
i[j].time=null;
i[j].alpha=30;
i[j].onmouseover=function(){
Move(this,100);
};
i[j].onmouseout=function(){
Move(this,30);
};
}
}
function Move(obj,setAlpha){
clearInterval(obj.time);
var speed=0;
obj.time=setInterval(function(){
if(obj.alpha==setAlpha)
{clearInterval(obj.time)}
if(obj.alpha>setAlpha)
{speed=-10;}
else
{speed=10;}
obj.alpha+=speed;
obj.style.filter="alpha(opacity:"+obj.alpha+")";
obj.style.opacity=obj.alpha/100;
},30)
}
</script>//希望能帮忙看看哪里有问题T-T
