anchor.diff:      </div>
       <div id="collapseFive" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingFive">
         <div class="panel-body">
  +
  +        <div class="form-actions-top col-xs-12" v-if="unregistereds.length !== 0">
  +          <div class="input-group col-xs-12 col-sm-5">
  +            Unregistered Instances
  +            <select class="form-control input-sm" v-model="selected_ec2">
  +              <option></option>
  +              <option v-for="x in unregistereds" :value="x.physical_id">{{* x.screen_name}} / {{x.physical_id}}</option>
  +            </select>
  +            <div class="input-group-btn">
  +              <button class="btn btn-primary btn-sm" @click="register()" :disabled="!selected_ec2">
  +                <%= I18n.t('ec2_instances.btn.register') %>
  +              </button>
  +            </div>
  +          </div>
  +        </div>
  +
           <div class="col-md-4 col-sm-6 col-xs-12" v-for="e in ec2_instances">
             <div class="panel" :class="panel_class(e.state)">
               <div class="panel-heading">
  
positive.code:   </div>
  </div>
  
    <div class="form-actions-top col-xs-12" v-if="unregistereds.length !== 0">
      <div class="input-group col-xs-12 col-sm-5">
        <select class="form-control input-sm" v-model="selected_ec2">
          <option></option>
          <option v-for="x in unregistereds" :value="x.physical_id">{{* x.screen_name}} / {{x.physical_id}}</option>
        </select>
        <div class="input-group-btn">
          <button class="btn btn-primary btn-sm" @click="register()" :disabled="!selected_ec2">
            <%= I18n.t('ec2_instances.btn.register') %>
          </button>
        </div>
      </div>
    </div>
  
  
  
  
negative.code: <div class="panel-group">
    <div class="panel panel-default">
      <div class="panel-heading" role="tab" id="headingOne">
          <h4 class="panel-title">
              DNS name
          </h4>
      </div>
      <div id="collapseOne" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne">
        <div class="panel-body">
  