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我想驗證模態中的名字和姓氏輸入字段。如果它是空的，它將傳遞一條消息「該字段是必需的！」紅色着色。驗證模態中的輸入字段
我面臨的問題是我的腳本沒有驗證字段。
請幫忙。
$(document).ready(function() {
$('#btn').click(function(e) {
var fieldIDArray = [$('#firstName', '#lastName')];
var spanIDArray = [$('#firstNameRequired',
'#lastNameRequired')];
for (i = 0; i < fieldIDArray.length; i++) {
if (!fieldIDArray[i].val()) {
e.preventDefault();
fieldIDArray[i].closest('.form-group')
.removeClass('has-success').addClass(
'has-error');
spanIDArray[i].show();
} else {
fieldIDArray[i].closest('.form-group')
.removeClass('has-error').addClass(
'has-success');
spanIDArray[i].hide();
}
}
});
});.requiredField {
color: red;
}<!DOCTYPE html>
<html>
<head>
<title>Modal FOrm</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script
src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script
src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="js/form-validation.js"></script>
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
<!DOCTYPE html>
<html>
<head>
<title>J2EE</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="../../js/applicantFormValidation.js"></script>
<link rel="stylesheet" type="text/css" href="../../css/style.css">
</head>
<body>
<a href="# " data-toggle="modal"
data-target="#RegFormModal" class="underline inputLabel">
Open Form Modal</a>
<div class="container">
<!-- Modal -->
<div class="modal fade" id="RegFormModal" tabindex="-1" role="dialog"
aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<!-- Modal Header -->
<div class="modal-header">
<button type="button" class="close" data-dismiss= modal>
<span aria-hidden="true">×</span> <span class="sr-only ">Close</span>
</button>
<h4 class="modal-title" id="myModalLabel ">My Modal</h4>
</div>
<!-- Modal Body -->
<div class="modal-body "> \t \t \t \t \t \t
<form id="applicationForm" name="applicationForm" role="form">
<!--action="ApplicationFormCheck" method="POST"> -->
<div class="form-group row">
<label for="firstName" class="col-md-2">First Name</label>
<div class="col-md-4">
<input type="text" class="form-control" id="firstName"
placeholder="Enter First Name" name="firstName" /> \t
</div>
<div class="col-md-4">
<span class="requiredField" id="firstNameRequired" style="display:none;">This field is Required!</span>
</div>
</div> \t \t
<div class="form-group row">
<label for="lastName" class="col-md-2">First Name</label>
<div class="col-md-4">
<input type="text" class="form-control" id="lastName"
placeholder="Enter Last Name" name="lastName" /> \t
</div>
<div class="col-md-4">
<span class="requiredField" id="lastNameRequired" style="display:none;">This field is Required!</span>
</div>
</div> \t \t
<div style="text-align: center;">
<button id="btn" type="submit" class="btn btn-default">Submit</button>
</div>
</form> \t \t \t \t \t \t \t
</div>
</div>
</div>
</div>
</div>
</body>
</html>
</body>
</html>