<body>
<script type="text/javascript">
var userEmail=prompt("Please enter your email address:","");
document.write(userEmail.indexOf("@"));
</script>
</body>
时间: 2024-08-29 15:48:11
<body>
<script type="text/javascript">
var userEmail=prompt("Please enter your email address:","");
document.write(userEmail.indexOf("@"));
</script>
</body>