div class="thumbnail clearfix">
+       <form name="searchForm">
        <div class="form-inline m-10 clearfix">
        <div class="form-group">
        <ul class ="nav nav-pills">
@@ -6,15 +7,15 @@
          <li ng-class="{active : searchOn}"><a ng-click="searchOn = true" >Search</a></li>
        </ul>
        </div>
-
-       <div ng-show="searchOn" class="search-bar form-group">
-         <input ng-model="keyword" type="text" class="form-control" placeholder="Enter keyword">
+       <div ng-class="{'has-error': searchForm.keyword.$error.required && searchForm.keyword.$dirty}" ng-show="searchOn" class="search-bar form-group">
+         <input ng-model="keyword" type="text" class="form-control" placeholder="Enter keyword" name="keyword" required>
            <button ng-click="search()" class="btn btn-primary">Go!</button>
        </div>
        <div class="form-group pull-right">
        <button class="btn btn-warning" ng-click="goBackToEditor()">Close</button>
        </div>
        </div>
+       </form>
        <div ng-show="!searchOn" class="pull-right to-info">