ext2 'checkbox'的单击事件

{
          columnWidth:.070,
          layout: 'form',hideLabels:true,
          items: [{
                    style:'margin-top:3px',
                  id:'dealN',
                   xtype:'checkbox',
                  checked:true,
                  boxLabel:'否',
                   listeners:{
                       check : function(obj,checked){
                                        Ext.getCmp("ended0").setValue(true);
                                   }
                      }
            }]
      }