javascript 正则表达式简单使用

<script type="text/javascript">var notemail = "hellowordl";var email = "[e-mail]";//1. 创建正则表单式对象var reg = new RegExp(/^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/);//2. 用test 方法判断是满足正则表达式var result = reg.test(notemail);    alert(notemail + "是否是邮箱 ？" + result);var result1 = reg.test(email);    alert(email + "是否是邮箱 ？" + result1);</script>