doc-src/examples/just_custom_layer.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<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>Custom tile layer alone</title>
        <style type='text/css'>
            textarea {
                width: 300px;
                height: 200px;
            }
        </style>
    </head>
    <body>
        <h1>Custom tile layer alone</h1>
        <p>This example shows how to use a custom tile layer alone.</p>
        <textarea id='myTextarea'></textarea>
        <script type='text/javascript'>//<![CDATA[

var map = new olwidget.EditableMap('myTextarea', {
  geometry: 'point',
  layers: [],
  mapOptions: {
    projection: "EPSG:4326",
    displayProjection: "EPSG:4326",
    maxExtent: [-180, -90, 180, 90],
  }
});

var layer = new OpenLayers.Layer.WMS( "VMap0",
    "http://labs.metacarta.com/wms/vmap0", {layers: 'basic', format: 'image/png'} 
);
map.addLayer(layer); 
// Must initialize the center after adding layers for the map to show up.
map.initCenter();


        //]]></script>
        <a href='#' onclick='document.getElementById("myTextarea").style.display="block";'>show textarea</a>

    </body>
</html>