tButton"  >
                            <p:dataExporter type="xlsx" target="tb1" fileName="hr_report_attendance"  />
                        </p:commandButton>
                        <p:commandButton value="Print" ajax="false" action="#" >
                            <p:printer target="gpBillPreview" ></p:printer>
                        </p:commandButton>
                        <p:panel id="gpBillPreview" >                     
                            <p:dataTable id="tb1" value="#{hrReportController