function setDuration () {
  document.filter_Report.elements['tx_jwpowerstation_pi1[isduration]'].value = 1
  document.filter_Report.submit();  
}

function setDuration1 () {
  document.filter_Report.elements['tx_jwfactoryashtransport_pi1[isdur]'].value = 1
  document.filter_Report.submit();  
}

function pagecnt () {
  var pagecnt;    
  pagecnt = parseInt(document.insert.elements['tx_jwpowerstation_pi1[pagecnt]'].value);
  pagecnt = pagecnt + parseInt(1);
  document.insert.elements['tx_jwpowerstation_pi1[pagecnt]'].value = pagecnt;
  document.insert.submit();  
}

function back () { 
  var count=0;
  count =parseInt(document.insert.elements['tx_jwpowerstation_pi1[pagecnt]'].value);
  history.go(-count);

}