Angularjs 未定义函数

我为发送电子邮件创建了一个模式。我正在检查输入以进行验证。但我得到了未定义的函数错误。错误代码为：

ReferenceError:未定义validateEmail

我添加了angularjs脚本。Ng应用程序已启动。另外，如何使用ng if语句显示错误

模式代码

<div id="contact" class="modal fade" role="dialog" name="contact" ng-controller="mailController">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal">&times;</button>
                <h4 class="modal-title"><span class="glyphicon glyphicon-phone-alt" style="color:#D9534F"></span> Contact Us?</h4>  
            </div>
            <div class="modal-body" style="width:600px; height:400px">     
                <section id="contact" style="">
                    <div class="container" style="width:100%;">
                        <div class="row">
                            <div class="about_our_company" style="margin-bottom: 20px;">
                                <h2 style="color:#ffff;" class="text-center">Write Your Message</h2>
                            </div>
                        </div> 
                        <div class="row">
                            <div class="col-md-6">
                                <form name="contactForm" id="contactForm">
                                    <div class="row">
                                        <div class="col-md-12">
                                            <div class="form-group required">
                                                <input ng-model="name" required type="text"  class="form-control" placeholder="Your Name *" id="name">
                                            </div>
                                            <div class="form-group">
                                                <input ng-model="email" type="email"  class="form-control" placeholder="Your Email *" id="email">
                                            </div>
                                            <div class="form-group">
                                                <input ng-model="phone" type="tel"  class="form-control" placeholder="Your Phone *" id="phone">
                                            </div>
                                            <div class="form-group">
                                                <textarea  ng-model="message" rows ="5" style = "resize:none;" required="enter"  class="form-control" placeholder="Your Message *" id="message"></textarea>
                                            </div>               
                                        </div>
                                        <div class="clearfix"></div>
                                        <div class="col-lg-12 text-center">
                                            <button type="button text-center"  class="btn btn-primary" ng-click="sendEmail();">Send Message</button>
                                        </div>
                                    </div>
                                </form>
                            </div>
                        </div>
                    </div>
                </section>         
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-danger" data-dismiss="modal">Close</button>
            </div>
        </div>
    </div>
</div>

---

$scope对象中定义的validateEmail和validateGsm函数必须与“$scope.”前缀一起使用。您也可以使用下面正确的代码

var name=$scope.name;
var email=$scope.validateEmail($scope.email);
var message=$scope.message;
var phone=$scope.validateGsm($scope.phone);

---

$scope对象中定义的validateEmail和validateGsm函数必须与“$scope.”前缀一起使用。您也可以使用下面正确的代码

var name=$scope.name;
var email=$scope.validateEmail($scope.email);
var message=$scope.message;
var phone=$scope.validateGsm($scope.phone);

---

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