function form_validator(form)
{

  if (form.mpr1.selectedIndex < 0)
  {
    alert("Please select one of the \"Primo Legante\" options.");
    form.mpr1.focus();
    return (false);
  }

  if (form.mpr1.selectedIndex == 0)
  {
    alert("The first \"Primo Legante\" option is not a valid selection.  Please choose one of the other options.");
    form.mpr1.focus();
    return (false);
  }

  if (form.peso1.value == "")
  {
    alert("Please enter a value for the \"Peso Primo Legante\" field.");
    form.peso1.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso1.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Primo Legante\" field.");
    form.peso1.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso1\" field.");
    form.peso1.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso2.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"peso2\" field.");
    form.peso2.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso2\" field.");
    form.peso2.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso3.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Primo Extender\" field.");
    form.peso3.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso3\" field.");
    form.peso3.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso4.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Secondo Extender\" field.");
    form.peso4.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso4\" field.");
    form.peso4.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso5.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Terzo Extender\" field.");
    form.peso5.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso5\" field.");
    form.peso5.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso6.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Quarto Extender\" field.");
    form.peso6.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso6\" field.");
    form.peso6.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso7.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Quinto Extender\" field.");
    form.peso7.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso7\" field.");
    form.peso7.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso8.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Sesto Extender\" field.");
    form.peso8.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso8\" field.");
    form.peso8.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso9.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Settimo Extender\" field.");
    form.peso9.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso9\" field.");
    form.peso9.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso10.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Primo Titanio\" field.");
    form.peso10.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso10\" field.");
    form.peso10.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso11.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Secondo Titanio\" field.");
    form.peso11.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso11\" field.");
    form.peso11.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso12.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Primo Pigmento\" field.");
    form.peso12.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso12\" field.");
    form.peso12.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso13.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Secondo Pigmento\" field.");
    form.peso13.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso13\" field.");
    form.peso13.focus();
    return (false);
  }

  var checkOK = "0123456789-,.";
  var checkStr = form.peso14.value;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
    if (ch == ",")
    {
      allNum += ".";
      decPoints++;
    }
    else if (ch != ".")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Peso Terzo Pigmento\" field.");
    form.peso14.focus();
    return (false);
  }

  if (decPoints > 1)
  {
    alert("Please enter a valid number in the \"peso14\" field.");
    form.peso14.focus();
    return (false);
  }
  return (true);
}