qq_慕沐4415436
2019-10-14 16:32
<!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>数组长度</title>
<script language="javascript">
var mynum=new Array(65,90,88,98);
document.write("数组的长度是:"+ mynum.lenght );
</script>
</head>
<body>
</body>
</html>
mynum.lenght 改成mynum.length
length打错啦
你吧length打成了lenght
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