doc-src/examples/info_cluster_simple.html

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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <!-- olwidget includes -->
        <script type='text/javascript' src='http://openlayers.org/api/2.8/OpenLayers.js'></script>
        <script type='text/javascript' src='../../js/olwidget.js'></script>
        <link rel="stylesheet" type="text/css" media="all" href="../../css/olwidget.css" />
        <title>Simple olwidget Info Example</title>
        <style type='text/css'>
            textarea {
                width: 300px;
                height: 200px;
            }
        </style>
    </head>
    <body>
        <h1>Simple Example</h1>
        <p>A simple example using the default point geometry.  Select the
        "draw" tool, and you can draw and move a point.</p>
        <div id='map'></div>
        <script type='text/javascript'>//<![CDATA[
            new olwidget.InfoMap('map', [
                    ["POINT(0 0)", "<p>Point Zero!!</p>"],
                    ["POINT(0 0)", "<p>Point One!</p>"]
                ],
                { cluster: true, layers: ['wms.blank'] }); 
        //]]></script>
        <a href='#' onclick='document.getElementById("myTextarea").style.display="block";'>show textarea</a>

    </body>
</html>