<!DOCTYPE html>
<html>
<head>
<title>比较运算符</title>
</head>
<body>
<script type="text/javascript">
<!-- ===:比较数值和类型推荐使用 ==：只比较数值 ！==：不等于数值和类型 ！=：只比较数值 -->
var a = 5;
var astr = '5';
var isequali = a !==astr;
console.log(isequali);
</script>
</body>
</html>