邮箱格式验证demo

最新推荐文章于 2025-09-06 08:01:57 发布

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最新推荐文章于 2025-09-06 08:01:57 发布

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CC 4.0 BY-SA版权

文章标签： javascript ViewUI

原文链接：http://www.cnblogs.com/Teacher-chang/p/5659917.html

<html>
<head>
<script type="text/javascript">
    function validate_email(field, alerttxt) {
        with (field) {
            apos = value.indexOf("@")
            dotpos = value.lastIndexOf(".")
            if (apos < 1 || dotpos - apos < 2) {
                alert(alerttxt);
                return false 
            }
            else {
                return true 
            }
        }
    }

    function validate_form(thisform) {
        with (thisform) {
            if (validate_email(email, "Not a valid e-mail address!") == false) {
                email.focus();
                return false
             }
        }
    }
</script>
</head>

<body>
<form action="submitpage.htm"onsubmit="return validate_form(this);" method="post">
Email: <input type="text" name="email" size="30">
<input type="submit" value="Submit"/> 
</form>
</body>
</html>