我是 JQuery 新手。 我想使用 jquery 对四个文本框进行验证。
我做过的编码
<html>
<head>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
<link href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.no-icons.min.css" rel="stylesheet">
<script src="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/js/bootstrap.min.js"></script>
<link href="runnable.css" rel="stylesheet" />
<script src="//code.jquery.com/jquery-1.9.1.js"></script>
<script src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.min.js"></script>
<script>
$(function() {
$("#register-form").validate({
rules: {
firstname: "required",
lastname: "required",
email: {
required: true,
email: true
},
password: {
required: true,
minlength: 5
},
agree: "required"
},
messages: {
firstname: "Please enter your first name",
lastname: "Please enter your last name",
password: {
required: "Please provide a password",
minlength: "Your password must be at least 5 characters long"
},
email: "Please enter a valid email address",
agree: "Please accept our policy"
},
submitHandler: function(form) {
form.submit();
}
});
});
</script>
</head>
<body>
<h1>Register here</h1>
<form action="" method="post" id="register-form" novalidate="novalidate">
<div class="label">First Name</div><input type="text" id="firstname" name="firstname" /><br />
<div class="label">Last Name</div><input type="text" id="lastname" name="lastname" /><br />
<div class="label">Email</div><input type="text" id="email" name="email" /><br />
<div class="label">Password</div><input type="password" id="password" name="password" /><br />
<div style="margin-left:140px;"><input type="submit" name="submit" value="Submit" /></div>
</form>
</body>
</html>
有人会检查我的程序吗，如果我没有向输入文本框提供任何文本，提交时应该显示红色消息，但没有显示正确的错误消息。
最佳答案
试试这段代码:
jQuery
$(document).ready(function () {
$('#submit').click(function (e) {
var isValid = true;
$('#firstname,#lastname,#email,#password').each(function () {
if ($.trim($(this).val()) == '') {
isValid = false;
$(this).css({
"border": "1px solid red",
"background": "#FFCECE"
});
}
else {
$(this).css({
"border": "",
"background": ""
});
}
});
if (isValid == false)
e.preventDefault();
});
});
提交按钮代码:
<div style="margin-left:140px;"><input type="submit" name="submit" value="Submit" id="submit" /></div>
你可以看到它的演示here .
关于javascript - 使用 jquery 验证文本框，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24429129/