哪位大神帮忙看一下，代码运行不出来

<!DOCTYPE html>
<html>
<head>
	<title>任意属性值</title>
	<meta charset="utf-8">
	<style>
		*{
			margin:0;
			padding:0;
		}
		ul,li{
			list-style: none;
		}
		#li1{
			width: 200px;
			height: 100px;
			background: yellow;
			margin-bottom: 10px;
			border: 2px solid red;
		}
		#li2{
			width: 200px;
			height: 100px;
			background: yellow;
			margin-bottom: 10px;
			border: 2px solid red;
		}
	</style>
	<script>
	window.onload=function(){
		var Li1=document.getElementsById('li1');
		var Li2=document.getElementsById('li2');
			li1.onmouseover=function(){
				startMove(this,'height',400);
			}
			li1.onmouseout=function(){
				startMove(this,'height',100);
			}
			li2.onmouseover=function(){
				startMove(this,'width',400);
			}
			li2.onmouseout=function(){
				startMove(this,'width',200);
			}
	}
	
	function startMove(obj,attr,target){
		clearInterval(obj.timer);
	   obj.timer=setInterval(function(){
		var icur=parseInt(getStyle(obj,attr));
		var speed=(target-icur)/8;
		speed=speed>0?Math.ceil(speed):Math.floor(speed);
		if (icur==target) {
			clearInterval(obj.timer);
		} else{
			obj.style[attr]=icur+speed+'px';
	}//style.width可以写成style['width']
		},30)
	}
	
	function getStyle(obj,attr) {
		if (obj.currentStyle) {
			return obj.currentStyle[attr];
		} else{
			return getComputedStyle(obj,false)[attr];
		};
	}
	</script>
</head>
<body>
	<ul>
		<li id="li1"></li>
		<li id="li2"></li>
	</ul>
</body>
</html>

FLY_QUEEN

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1回答

qq_青枣工作室_0

打开控制台，可以看到报错啊var Li1=document.getElementsById('li1');getElementsById多了一个s，其他地方一样

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