title: Uncaught ReferenceError: ContainerPanel is not defined
body: <p>I created one panel in extjs. </p>
  
  <p>When I execute this it's showing this error:
  'Uncaught ReferenceError: ContainerPanel is not defined'</p>
  
  <p>Please correct me where am I wrong. </p>
  
  <p>My code can be seen below:</p>
  
  <pre><code> Ext.application({
   launch : function(){
                  Ext.create('Ext.panel.Panel',{
                      renderTo:Ext.getBody(),
                      width:400,
                      height:400,
                      title:ContainerPanel,
                      items: [
                              {
                                  xtype:panel,
                                  height:100,
                                  width:200,
                                  columnWidth:0.5
  
                              },
  
                              {
                                  xtype:panel,
                                  height:100,
                                  width:200,
                                  columnWidth:0.5
  
                              }]
  
                  });
              }
  </code></pre>
  
  <p>});</p>
  
  <p>Thanks</p>