<!--//

function dm(amount) 
{
  string = "" + amount;
  dec = string.length - string.indexOf('.');
  if (string.indexOf('.') == -1)
  return string + '.00';
  if (dec == 1)
  return string + '00';
  if (dec == 2)
  return string + '0';
  if (dec > 3)
  return string.substring(0,string.length-dec+3);
  return string;
}


function calculate()
{

  QtyA = 0;  QtyB = 0;  QtyC = 0;
  TotA = 0;  TotB = 0;  TotC = 0;

  PrcA = 50.00; PrcB = 70.00; PrcC = 8.90;

 
  if (document.ofrm.qtyA.value > "")
     { QtyA = document.ofrm.qtyA.value };
  document.ofrm.qtyA.value = eval(QtyA);  
 
  if (document.ofrm.qtyB.value > "")
     { QtyB = document.ofrm.qtyB.value };
  document.ofrm.qtyB.value = eval(QtyB);  
 
  if (document.ofrm.qtyC.value > "")
     { QtyC = document.ofrm.qtyC.value };
  document.ofrm.qtyC.value = eval(QtyC);
 
 
  TotA = QtyA * PrcA;
  document.ofrm.totalA.value = dm(eval(TotA));
 
  TotB = QtyB * PrcB;
  document.ofrm.totalB.value = dm(eval(TotB));
 
  TotC = QtyC * PrcC;
  document.ofrm.totalC.value = dm(eval(TotC));
 
 
  Totamt = 
     eval(TotA) +
     eval(TotB) +
     eval(TotC) ;
    
  document.ofrm.GrandTotal.value = dm(eval(Totamt));
  
} 


function validNum(theForm)
{
  var checkOK = "0123456789.,";
  var checkStr = theForm.qtyA.value;
  var allValid = true;
  var validGroups = 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 == "," && decPoints != 0)
    {
      validGroups = false;
      break;
    }
    else if (ch != ",")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Class A quantity\" field.");
    theForm.qtyA.focus();
    return (false);
  }

  if (decPoints > 1 || !validGroups)
  {
    alert("Please enter a valid number in the \"Class A quantity\" field.");
    theForm.qtyA.focus();
    return (false);
  }

  var checkOK = "0123456789.,";
  var checkStr = theForm.qtyB.value;
  var allValid = true;
  var validGroups = 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 == "," && decPoints != 0)
    {
      validGroups = false;
      break;
    }
    else if (ch != ",")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Class B quantity\" field.");
    theForm.qtyB.focus();
    return (false);
  }

  if (decPoints > 1 || !validGroups)
  {
    alert("Please enter a valid number in the \"Class B quantity\" field.");
    theForm.qtyA.focus();
    return (false);
  }

  var checkOK = "0123456789.,";
  var checkStr = theForm.qtyC.value;
  var allValid = true;
  var validGroups = 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 == "," && decPoints != 0)
    {
      validGroups = false;
      break;
    }
    else if (ch != ",")
      allNum += ch;
  }
  if (!allValid)
  {
    alert("Please enter only digit characters in the \"Class C quantity\" field.");
    theForm.qtyC.focus();
    return (false);
  }

  if (decPoints > 1 || !validGroups)
  {
    alert("Please enter a valid number in the \"Class C quantity\" field.");
    theForm.qtyC.focus();
    return (false);
  }


  calculate();
  return (true);
} 


//-->