hello
I tryto find the numberof months,daysandhoursbetween twodateswithextjs!
I haveaproblemin my code!

Code:
{    //Lbl_Date_Heure_Effet
                x: 10,
                y: 85,
                xtype: 'label',
                cls: 'x-abs-required-layout-item',
                text: currentFichePoliceCorpsLabels.Lbl_Date_Heure_Effet + " :"
            },
            {
                x: 120,
                y: 85,
                xtype: 'label',
                id: CurrentSheetID + '_poli_date_effet_label',
                text: Format_Date(currentFichePoliceCorps.poli_date_effet)
            },
            {
                x: 120,
                y: 80,
                xtype: 'datefield',
                hidden: ((currentFichePoliceCorps.nbr_note_debit > 0  ,
                allowBlank: false,
                width: 140,
                value: currentFichePoliceCorps.poli_date_effet,
                maxValue : currentFichePoliceCorps.poli_date_fin,
                format: GlobalListLabels.Format_Date_Time,
                id: CurrentSheetID + '_poli_date_effet',
                listeners:
                {
                    blur: function(elem) 
                    {
                        if (elem.isValid()) 
                        {
                            if(elem.getValue() != null && elem.getValue() != "")
                            {
                                Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).setMinValue ( elem.getValue() );
                            }
                             if(elem.getValue() != null && elem.getValue() != "" && Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).getValue() != "" && Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).getValue() != null)
                            {
                                var m = (Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).getValue().getFullYear() - elem.getValue().getFullYear()) * 12 + (Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).getValue().getMonth() - elem.getValue().getMonth());
                                Ext.getCmp(CurrentSheetID + '_poli_nb_mois').setValue(m);
                            
                                var j = (Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).getValue().getFullYear() - elem.getValue().getFullYear()) * 365 + (Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).getValue().getDay() - elem.getValue().getDay());                              
                                Ext.getCmp(CurrentSheetID + '_poli_nb_jours').setValue(j);
                                Ext.getCmp(CurrentSheetID + '_poli_nb_jours_12m').setValue(j);
                                
                                var h = (Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).getValue().getFullYear() - elem.getValue().getFullYear()) * 8760 + (Ext.getCmp(CurrentSheetID + "_poli_date_fin" ).getValue().getHours() - elem.getValue().getHours());
                                Ext.getCmp(CurrentSheetID + '_poli_nb_heures').setValue(h); 
                            }
                        }
                    }
                }
            },
            {    //Lbl_Date_Heure_Fin
                x: 10,
                y: 110,
                xtype: 'label',
                cls: 'x-abs-required-layout-item',
                text: currentFichePoliceCorpsLabels.Lbl_Date_Heure_Fin + " :"
            },
            {
                x: 120,
                y: 110,
                xtype: 'label',
                id: CurrentSheetID + '_poli_date_fin_label',
                text: Format_Date(currentFichePoliceCorps.poli_date_fin)
            },
            {
                x: 120,
                y: 105,
                xtype: 'datefield',
                hidden: pasModifiable,
                width: 140,
                allowBlank: false,
                value: currentFichePoliceCorps.poli_date_fin,
                minValue : currentFichePoliceCorps.poli_date_effet,
                hidden: ((currentFichePoliceCorps.nbr_note_debit > 0,
                format: GlobalListLabels.Format_Date_Time,
                id: CurrentSheetID + '_poli_date_fin',
                listeners:
                {
                    blur: function(elem) 
                    {
                        if (elem.isValid()) 
                        {


                            if(elem.getValue() != null && elem.getValue() != "")
                            {
                                Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).setMaxValue ( elem.getValue() );
                            }
                            if(elem.getValue() != null && elem.getValue() != "" && Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).getValue() != "" && Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).getValue() != null)
                            {
  var m = (elem.getValue().getFullYear ()- Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).getValue().getFullYear ()) * 12 + (elem.getValue().getMonth ()- Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).getValue().getMonth ());
                                Ext.getCmp(CurrentSheetID + '_poli_nb_mois').setValue(m);
                                
                                var j = (elem.getValue().getFullYear ()- Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).getValue().getFullYear ()) * 365 + (elem.getValue().getMonth ()- Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).getValue().getMonth ());
                                Ext.getCmp(CurrentSheetID + '_poli_nb_jours').setValue(j);                      
                                var h = (elem.getValue().getFullYear ()- Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).getValue().getFullYear ()) * 8760 + (elem.getValue().getMonth ()- Ext.getCmp(CurrentSheetID + "_poli_date_effet" ).getValue().getMonth ());
                                Ext.getCmp(CurrentSheetID + '_poli_nb_heures').setValue(h);
                                
                                
                            }
                            
                        }


                    }
                }
            }
thank you for correcting me