title: open html file on button click in Ext-JS4
body: <p>I am running a html file in which when I click the submit button a new html file should open.</p>
  
  <p>This is the code:
  code running in loginForm.html</p>
  
  <pre><code>{
      xtype : 'button',
      text : ' Login ',
      formBind : true,
      listeners : {
          click :function(){ 
              alert();
              //these methods are not working
              //Ext.getCmp('login_panel').load({url : '/smartNav/pub/html/index_dev.html', scripts : true});
              //Ext.getCmp('login_panel').update('index_dev.html');
  
          }   
      }
  }
  </code></pre>
  
  <p>Can someone suggest me how this can be done?</p>