I have a following code:

Code:
var WeeklyTimesheetFrame = Ext.extend(Ext.Panel, {
    title: 'Timesheet',
    iconCls: 'time',
    fullscreen: true,
    items: [{
        xtype: "fieldset",
        title: "Weekly Timesheet",
        items: [{
            xtype: "calendarpickerfield",
            label: "Date",
            dateFormat: 'd-m-Y',
            value: new Date(),        
            
            listeners: {
                render: function () {
                   var ChangingDate= ???  // How do I get changing date?
                  alert(ChangingDate);
             }
            }
            //~Riaz-23rd11

        }]
    }


    ]
});



Ext.reg("jsWeeklyTimeSheetList", WeeklyTimesheetFrame);
How do I show changing value into the "ChangingDate" variable?