显示错误index.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>变量命名</title>
<script type="text/javascript">
var myname;
</script>
</head>
<body>
</body>
</html>