<!--
  function setpoint()
    {
    window.document.PipeCalc.fDiameter.value = window.document.PipeCalc.fDiameter.value.replace(/\D/,".");
    window.document.PipeCalc.fWall.value = window.document.PipeCalc.fWall.value.replace(/\D/,".");
    window.document.PipeCalc.fCalcLength.value = window.document.PipeCalc.fCalcLength.value.replace(/\D/,".");
    window.document.PipeCalc.fCalcWeight.value = window.document.PipeCalc.fCalcWeight.value.replace(/\D/,".");
    }

  function calc_m()
    {
    setpoint();
    d = parseFloat(window.document.PipeCalc.fDiameter.value);
    s = parseFloat(window.document.PipeCalc.fWall.value);
    l = parseFloat(window.document.PipeCalc.fLength.value);
    if (window.document.PipeCalc.fMeasure[0].checked) {u=1} else {u=1000}
    m = Math.round(Math.PI*s*7.85*(d-s)*l/u)/1000;
    window.document.PipeCalc.fCalcWeight.value = m;
    }

  function calc_l()
    {
    setpoint();
    d = parseFloat(window.document.PipeCalc.fDiameter.value);
    s = parseFloat(window.document.PipeCalc.fWall.value);
    m = parseFloat(window.document.PipeCalc.fWeight.value);
    if (window.document.PipeCalc.fMeasure[0].checked) {u=1} else {u=1000}
    l = Math.round(m*100000*u/(Math.PI*s*7.85*(d-s)))/100;
    window.document.PipeCalc.fCalcLength.value = l;
    }
-->