dojo contents appear briefly and then they disappear
<p>I have this simple page that should display a bordercontainer with top, bottom and center regions. When you run it, contents briefly appear and then they disappear. Firebug shows no error and i can't see anything wrong with the code.</p>

<p>thank you.    </p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
    &lt;html&gt;
    &lt;head&gt;
    &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8"&gt;  
    &lt;meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"&gt;
    &lt;link rel="stylesheet" href="http://js.arcgis.com/3.13/esri/css/esri.css" /&gt;
    &lt;link rel="stylesheet" href="http://js.arcgis.com/3.13/dijit/themes/claro/claro.css"&gt;
 &lt;link rel="stylesheet" href="http://js.arcgis.com/3.13/dojox/grid/resources/Grid.css"&gt;
 &lt;link rel="stylesheet" href="http://js.arcgis.com/3.13/dojox/grid/resources/claroGrid.css"&gt;
    &lt;script src="http://js.arcgis.com/3.13/"&gt;&lt;/script&gt;    
    
    &lt;script &gt;
    var dojoConfig = {       
        parseOnLoad: true
    }
    
    require(
 ['dijit/layout/BorderContainer', 'dijit/layout/ContentPane',
 "dojo/parser", 
 "dojo/domReady!" ],  
 function(BorderContainer, ContentPane, parser) { 
  parser.parse();
 });
    
    &lt;/script&gt;                      
    &lt;/head&gt;

    &lt;body class="claro" style="font-family: Verdana; font-size: 11px;"&gt;            
 &lt;div data-dojo-type="dijit.layout.BorderContainer" data-dojo-  props="design:'headline',gutters:false" style="width:100%; height:100%;"&gt;          
     &lt;div data-dojo-type="dijit.layout.ContentPane" data-dojo- props="region:'top'"&gt;
      top
     &lt;/div&gt;

     &lt;div data-dojo-type="dijit.layout.ContentPane" data-dojo- props="region:'bottom'"&gt;
      bottom
     &lt;/div&gt;
     
     &lt;div data-dojo-type="dijit.layout.ContentPane" data-dojo- props="region:'center'"&gt;
      center
     &lt;/div&gt;     
   &lt;/div&gt;          
    &lt;/body&gt;


&lt;/html&gt;</code></pre>
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