<script type="text/javascript">
//比较运算符>
/* var a = 123;
var b = "123";
var c = a==b;//==判断数据的内容，不判断类型
console.log(c);//true
var d = a===b;
console.log(d);//判断内容和数据 false 因为数据类型不一致*/
// ！=判断数据的内容不一样
/*var a = "woai";
var b = "aaa";
var c = a!=b;
console.log(c);//true*/
// !==判断数据内容和类型不相等
var a = "woai";
var b = "woai";
var c = a!==b;
console.log(c);//false
</script>