function remove_spaces(inputstring) {
  return inputstring.replace (/^\s+/, '').replace (/\s+$/, '');
}

function remove_non_numeric(inputstring) {
  return inputstring.replace( /[^0-9]/g, "" );
}
function breakframes(){
  if (top.location != location) {
    top.location.href = document.location.href ;
  }
}