function doweight (form)
{
  vol = form.length.value * form.width.value * form.height.value;
  volw =  Math.ceil(vol / 6000);
/*
  volw = parseInt( volw );
  b = volw % 10;
  c=0;
  if( (5 < b) && (b <=9 ) )
  {
    c=1;
  }
  
  fweight = volw + c;
*/
  fweight = volw;
  if( vol != 0 && ( isNaN( fweight ) || fweight < 1 ) ) fweight = 1;
  
  form.answer.value = parseFloat(fweight);

  return 1;
}