title: Combo box not visible with xtype:combo. there is no form involved
body: <p>Team,</p>
  
  <p>I am facing one problem where combo box is not rendering on the div. My apology  if it is very basic but I am newbie to EXTJS.</p>
  
  <p>Ext Js version is 3.x. Even I donot know how to format the code so apology on that as well.</p>
  
  <p>code </p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
  &lt;title&gt;Expansion&lt;/title&gt;
  &lt;link rel="stylesheet" type="text/css" href="ext/resources/css/ext-all.css" /&gt;
  &lt;script type="text/javascript" src="ext/adapter/ext/ext-base.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="ext/ext-all.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
  &lt;div id="c1"&gt;&lt;/div&gt;
  
  &lt;div id="c2"&gt;&lt;/div&gt;
  
  &lt;/body&gt;
  &lt;/html&gt;
  
  &lt;script type="text/javascript"&gt;
  
  Ext.onReady(function(){
  var itemsl=[];
  itemsl.push([Ext.apply({
  xtype:'combo',
  triggerAction: 'all',
  mode: 'local',
  store: new Ext.data.ArrayStore({
  id: 0,
  fields: [
  'myId',
  'displayText'
  ],
  data: [[1, 'item1'], [2, 'item2']]
  }),
  valueField: 'myId',
  displayField: 'displayText',
  emptyText: 'deactivated listbox',
  _isExpanded: true,
  isExpanded : function(){
  return this._isExpanded || (this.list &amp;&amp; this.list.isVisible());
  },
  renderTo: Ext.get('c1')
  })
  
  ]);
  });
  
  &lt;/script&gt; 
  </code></pre>