JavaScript for循环

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<style>
li{
	height: 30px;
	border-bottom:1px solid #333;
}
</style>
<script>
window.onload=function()
{
	/*var oUl=document.getElementById('list');
	var aLi=oUl.getElementsByTagName('li');
	var arr=['今天','明天','后天'];
	for(var i=0;i<aLi.length;i++)
	{	
		aLi[i].innerHTML=arr[i]
		
	}*/
	var str='';
	for(var i=0;i<200;i++){
		str+='<input type="button" value="aaa"/>';
	}
	document.body.innerHTML=str;
}
</script>
</head> 

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

 


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