function change_currency() {
   document.currency_update_form.currency_changed.value = "1";
   document.currency_update_form.submit();
   return true;
}

function popupWindow(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width=378,height=438,screenX=100,screenY=100,top=100,left=100')
}

function popupHelp(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=400,height=400,screenX=20,screenY=50,top=50,left=20')
}

function popupPrint(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=yes,scrollbars=yes,resizable=yes,copyhistory=no,width=800,height=600,screenX=20,screenY=50,top=50,left=20')
}

function enable_city_pay_extra(radio_btn, idx) {
   document.getElementsByName(radio_btn)[idx].checked= true;
}