function fclear(form)
  {
        form.meas[0].checked = true
        form.mb.value = ""
        form.inch.value = ""
        form.mm.value = ""
  }

  function in2mm(inch)
  {
	return(inch / 0.03937);
  }

  function in2mb(inch)
  {
	return(inch / 0.0295300);
  }

  function mm2in(mm)
  {
	return(mm * 0.03937);
  }

  function mb2in(mb)
  {
	return(mb * 0.0295300);
  }


	function compute(obj) {
		
		// Setup constants
		mb = 0;		// millibars index
		inch = 1;	// inches index
		mm = 2;		// millimeters index

		if (obj.meas[mb].checked) {
			// Convert from millibars
			obj.inch.value = mb2in(obj.mb.value);
			obj.mm.value = in2mm(obj.inch.value);
		} else if (obj.meas[inch].checked) {
			// Convert from inches
			obj.mb.value = in2mb(obj.inch.value);
			obj.mm.value = in2mm(obj.inch.value);
		} else	/* obj.meas[mm].checked */ {
			// Convert from millimeters
			obj.inch.value = mm2in(obj.mm.value);
			obj.mb.value = in2mb(obj.inch.value);
		}

	}