                        課程
                    
                        /前端開發(fā)
                        
                            /JavaScript
                        
                        /JS動畫效果

多個動畫獲取樣式

<!DOCTYPE?html?PUBLIC?"-//W3C//DTD?XHTML?1.0?Transitional//EN"?"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html?xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
<title>無標題文檔</title>
<style?type="text/css">
*{margin:0;padding:0;}
ul{list-style:none;}
li{display:block;margin-top:10px;height:100px;width:100px;background-color:#CCC;border:5px?solid?#FC3}
</style>
<script?type="text/javascript">
window.onload=function(){
	var?ali=document.getElementsByTagName("li");
	for(i=0;i<ali.length;i++){
	?
	?ali[i].onmouseover=function(){startMove(this,200)};
	?ali[i].onmouseout=function(){startMove(this,100)};
		}
	}

function?startMove(obj,target){
	clearInterval(obj.timer);
	obj.timer=setInterval(function(){
		var?speed=(target-parseInt(getStyle(obj,"width")))/8;
		speed=speed>0?Math.ceil(speed):Math.floor(speed);
		if(parseInt(getStyle(obj,"width"))==target){clearInterval(obj.timer)}
		else{obj.style.width=parseInt(getStyle(obj,"width"))+speed+"px"}
		},30)
}
function?getStyle(obj,attr){
	if(obj.currentStyle){
		return?obj.currentStyle[attr]
		}
	else{return?getComputedStyle(obj,false)[attr];}
	}

</script>
</head>

<body>
<ul>
?<li></li>
?<li></li>
?<li></li>
?<li></li>

</ul>
</body>
</html>

代碼如上，在Dreamweaver里面運行不了，但在搜狗瀏覽器里可以運行，求大神解答這是為什么呀？代碼有什么錯誤嗎？