<html>
<head> <script> function verifyAddress(obj) { var email = obj.email.value; var pattern = /^([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/; flag = pattern.test(email); if(flag) { alert("恭喜您！您填写的邮箱地址是正确的！"); return true; } else { alert("你填写的邮件错误"); } } </script></head>
<body> <form onSubmit="return verifyAddress(this);"> <input name="email" type="text"> <input type="submit" value="提交"> </form> </body> </html>
例子二：js 时间
<script>
var now=new Date();var hour=now.getHours();var minu=now.getMinutes();alert(hour+":"+minu);</script>