Web-JavaScript-JavaScript表单验证
【摘要】 <!DOCTYPE html><html><head> <meta charset="utf-8"> <title>JavaScript 表单验证</title> <script> function validateForm() { var x = document.forms["myForm"]["fname"].value; if (x...
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript 表单验证</title>
<script>
function validateForm() {
var x = document.forms["myForm"]["fname"].value;
if (x == null || x == "") {
alert("姓必须填写");
return false;
}
}
</script>
<script>
function validateForm() {
var x = document.forms["myForm"]["email"].value;
var atpos = x.indexOf("@");
var dotpos = x.lastIndexOf(".");
if (atpos < 1 || dotpos < atpos + 2 || dotpos + 2 >= x.length) {
alert("Not a valid e-mail address");
return false;
}
}
</script>
</head>
<body>
<form name="myForm" action="demo-form.php" οnsubmit="return validateForm()" method="post">
姓:
<input type="text" name="fname">
<input type="submit" value="提交">
</form>
<form name="myForm" action="demo-form.php" οnsubmit="return validateForm();" method="post">
Email:
<input type="text" name="email">
<input type="submit" value="Submit">
</form>
</body>
</html>
【版权声明】本文为华为云社区用户原创内容,转载时必须标注文章的来源(华为云社区)、文章链接、文章作者等基本信息, 否则作者和本社区有权追究责任。如果您发现本社区中有涉嫌抄袭的内容,欢迎发送邮件进行举报,并提供相关证据,一经查实,本社区将立刻删除涉嫌侵权内容,举报邮箱:
cloudbbs@huaweicloud.com
- 点赞
- 收藏
- 关注作者
评论(0)