<div id="login_form">
  <div class="message" ng-class="{'error': message !== ''}">{{message}}</div>
  <ul id="tab-choice">
    <li>
      <input type="radio" value="login" ng-model="tab" name="choose-tab" id="chLogin" />
      <label for="chLogin">Login</label>
    </li>
    <li>
      <input type="radio" value="adduser" ng-model="tab" name="choose-tab" id="chAdduser" />
      <label for="chAdduser">Sign Up</label>
    </li>
  </ul>
  <div class="relCont">
    <div class="tab" ng-class="{front: tab === 'adduser'}">
      <form>
        <input type="text" ng-model="username" placeholder="Username" /><br />
        <input type="password" ng-model="password" placeholder="Password" /><br />
        <input type="password" ng-model="confirm" placeholder="Confirm Password" /><br />
        <button ng-click="newuser()">Sign Up</button>
      </form>
    </div>
    <div class="tab" ng-class="{front: tab === 'login'}">
      <form ng-submit="login()" method="POST">
        <input type="text" ng-model="username" placeholder="Username" /><br />
        <input type="password" ng-model="password" placeholder="Password" /><br />
        <button type="submit">Log In</button>
      </form>
    </div>
  </div>
</div>