e License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<html>
<head>
  <style>
  </style>
</head>
<body>

<button id="alert" onclick='displayAlert()'>show alert</button>
<button id="alert-delay" onclick='displayAlertAfterDelay()'>show alert after delay</button>
<button id="confirm" onclick='displayConfirm()'>show confirm</button>
<button id="just-button">just button</button>
<div id="message"></div>

<script>
  function displayAlert() {
    alert("hello\naler