版权声明：本文为博主原创文章，转载请标注，谢谢 https://blog.csdn.net/qq_43462019/article/details/85800510
function isEmail(email){
if (email=="") {
alert("邮箱不能为空") ;
} else if (email.split("@").length==1 || email.split(".").length==1) {
alert("邮箱地址必须包含@和.");
} else {
let arr = email.split("@") ;
alert("邮箱地址正确，邮箱名称是："+arr[0]) ;
}
}<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>验证邮箱地址</title>
</head>
<script type="text/javascript" src="验证邮箱地址.js"></script>
<body>
<input type="button" value="操我" onclick="isEmail(prompt('请输入正确的邮箱地址','[email protected]'))" />
</body>
</html>示例图：
