angular_simple-validation_ng-disabled.html

<form name="aForm" novalidate> 
  <label for="name">Your email</label> 
  <input type="email" id="name" ng-model="name" name="aField" required>
  <ng-messages for="aForm.aField.$error"
               ng-show="aForm.aField.$invalid && aForm.aField.$dirty">
    <ng-message when="required">This field is required</ng-message>
    <ng-message when="email">Please enter a valid email address</ng-message>
  </ng-messages>
  <button ng-click="save()" ng-disabled="aForm.$invalid">Send</button>
</form>