                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /JS动画效果

为什么图形完全不动？

按照视频课程打的代码，但是发现图形并不会动，求助大神！在这先感谢您费眼看我这代码了。

多物体同时运动的html文件

<!DOCTYPE html>
<html xmlns="http://">
<head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"></meta>     <!-- 可让中文正常显示 -->
    <title>多物体同时运动，同时改变宽高透明度</title>
    <link href="css/main.css" rel="stylesheet" />
    <style type="text/css">
       ul,li {
       	list-style: none;
       }
       ul li{
       	width: 200px;
       	height: 100px;
       	background: yellow;
       	margin-bottom: 20px;
        border: 2px solid red;
        filter:alpha(opacity:30);
        opacity: 0.3;
       }

    </style>
    
    <script src="js/perfectmove.js"></script>   
    <script>
    window.onload=function(){
        var ali=document.getElementById('li1');
        ali.onmouseover=function(){
            startMove(ali,{width:400,height:200,opacity:100});      
        }
        ali.onmouseout=function(){
          startMove(ali,{width:200,height:100,opacity:30});
            }
    </script>
</head>

<body>
<ul>
	<li id="li1"></li>
</ul>
</body>
</html>

完美运动框架的js代码：

    //完美运动框架,可同时变化
    function startMove(obj,json,fn){     
        var flag=true;  //假设所有的运动都到达了目标值
        clearInterval(obj.timer);  
        obj.timer=setInterval(function(){
            for(var attr in json){
            //1.取当前的值
            var icur=0;
            if (attr=='opacity') {                    
                icur=Math.round(parseFloat(getStyle(obj,attr))*100); 
            }
            else{
                icur=parseInt(getStyle(obj,attr));    
            }
            //2.计算速度
            var speed=(json[attr]-icur)/8;
            speed=speed>0?Math.ceil(speed):Math.floor(speed);
            //3.监测停止
            if (icur!=json[attr]) {   //如果不是所有的运动都到达了终点
                flag=false;
            }
            
            if (attr=='opacity') {  
                    obj.style.filter='alpha(opacity:'+(icur+speed)+')';  
                    obj.style.opacity=(icur+speed)/100;
                }
            else{
                    obj.style[attr]=icur+speed+'px';
                }               
                            
                        }
            if (flag) {
                clearInterval(obj.timer);
                if(fn)
                {
                    fn();
                }
            }
        },30)
    }

    function getStyle(obj,attr){
        if(obj.currentStyle){
        return obj.currentStyle[attr];
        }
        else{
        return getComputedStyle(obj,false)[attr];
        }
    }