HTML_Practice/string_ob3.html at master · cheonsong/HTML_Practice · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var userEmail = prompt("당신의 이메일 주소는?","");
        var arrUrl = [".co.kr",".com",".net",".or.kr",".go.kr"];

        var check1 = false;
        var check2 = false;

        if(userEmail.indexOf("@")>0){
            check1 = true;
        }

        for(var i=0; i<arrUrl.length; i++){
            if(userEmail.indexOf(arrUrl[i])>0){
                check2 = true;
            }
        }

        if(check1 && check2){
            document.write(userEmail);
        }
        else{
            alert("이메일 형식이 잘못되었습니다.");
        }

    </script>
</body>
</html>