function date_format(date) {
  if(date.indexOf('-')==-1) {
    if(date!='') {
      var day=date.substr(0,2);
      var month=date.substr(3,2);
      var year=date.substr(6,4);
      date=year+"-"+month+"-"+day;
    }
  }
  return date;
}

function date_deformat(date) {
  if(date.indexOf('-')!=-1) {
    if(date!='') {
      var day=date.substr(0,4);
      var month=date.substr(5,2);
      var year=date.substr(8,2);
      date=day+"/"+month+"/"+year;
    }
  }
  return date;
}