Angular form validation is not working - angularjs

Question

I have the following form :
UPDATE
<script type="text/ng-template" id="form-profile.html">
<form id="f1" name="form">
<div class="form-group">
<label>Name</label>
<input type="text" class="form-control" name="name" ng-model="formData.name" ng-class="submitted ? 'ng-dirty' : ' ' " required autofocus>
<span style="color:red" ng-show="form.name.$dirty || form.name.$invalid">Name is required</span>
</div>
<div class="form-group">
<label for="name">E-mail</label>
<input type="text" class="form-control" name="email" ng-model="formData.email" ng-class="submitted ? 'ng-dirty' : ' '" required autofocus>
<span style="color:red" ng-show="f1.email.$dirty && f1.email.$invalid">
<span ng-show="f1.email.$error.required">Email is required.</span>
</span>
</div>
<div class="form-group">
<label for="Cellphone">Mobil nr.</label>
<input type="text" class="form-control" name="Cellphone" ng-model="formData.Cellphone" ng-class="submitted ? 'ng-dirty' : ' '" required autofocus>
<span style="color:red" ng-show="f1.Cellphone.$dirty && f1.Cellphone.$invalid">
<span ng-show="f1.Cellphone.$error.required">Cellphone is required.</span>
</span>
</div>
<div class="form-group">
<label for="address">Adresse</label>
<input type="text" class="form-control" name="address" ng-model="formData.address">
</div>
<div class="form-group col col-33 col-offset-67">
<a ui-sref="front.form.organisation" class="button icon-right ion-chevron-right button-energized .col-offset-50">
Next
</a>
</div>
</form>
</script>
When I press next I want the form to disable the next button and show me the errors.
I have tried with name so far and I did not get the errors.
Thank you

Answer 1

Please see demo below
ng-show="f1.name.$dirty <-- f1 that's form name not id
var app = angular.module('app', []);
app.controller('homeCtrl', function($scope) {
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
<div ng-controller="homeCtrl">
<form name="f1">
<div class="form-group">
<label>Name</label>
<input type="text" class="form-control" name="name" ng-model="formData.name" required autofocus>
<span style="color:red" ng-show="f1.name.$dirty && f1.name.$invalid">Name is required</span>
</div>
</form>
</div>