JavaScript (DHTML Code) / Tax calculator

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<!-- Dynamic HTML code / JavaScript

     Personal income tax calculator (federal and provincial deductions).

( c. 2004  Igor Klepoch )
-->

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML>
<HEAD>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<meta name="robots" content="noindex, nofollow">	
	<TITLE>TAX calcucator</TITLE>

	<script language="JavaScript"  type="text/javascript" src="src/tax.js"></script>

	<script language='javascript'  type="text/javascript" >

	var LastElem1 = 0;
	var LastElem2 = 0;

	function AddHeader (oTHead, txt) {
	  oTHead.appendChild(oRow);

	  oCell = document.createElement("TH");
	  oCell.innerText = txt;
	  oCell.className ='TblHeader';
	  oRow.appendChild(oCell);

	}

	function AddCell (oCell, oRow, Data, className) {
		oCell = document.createElement("TD");
		oCell.innerText = Data;
			oCell.className = className;
		oRow.appendChild(oCell);
	}

	function AddCell1 (oRow, Data, className) {
		oCell = document.createElement("TD");
		oCell.innerText = Data;
			oCell.className = className;
		oRow.appendChild(oCell);
	}

	function AddFederalInfo (oTBody, Title, Val, className) {

		oRow = document.createElement("TR");
	  
		AddCell1 (oRow, Title, className);
		AddCell1 (oRow, Val, className);

		oTBody.appendChild(oRow);

	}

	function FormatAmt (t)
	{return (Math.floor(t * 100)/100)};

	function ShowTable (Amt) {

	Amt = Math.round (Amt);

	var oTable = document.createElement("TABLE");
	var oTBody = document.createElement("TBODY");
	oTable.appendChild(oTBody);

	oTable.className='TblFormatFed';

	for (t=0;t<3;t++){
	  CDed = FormatAmt (CalcTax (ProvList[t][0], Amt));
	  AddFederalInfo (oTBody, ProvList[t][1], CDed, 'TblFederal');
	}

	FEDAmt = CalcTax (FED, Amt);
	EIAmt = CalcTax (EI, Amt);
	CPPAmt = CalcTax (CPP, Amt);

	FedDED = ProvList[0][0][0][0] * (ProvList[0][2] + EIAmt + CPPAmt) / 100;
	TotDED = FormatAmt (FEDAmt + EIAmt + CPPAmt - FedDED);

	AddFederalInfo (oTBody, 'Basic personal amount for Federal Taxes (Credit)', FedDED, 'TblFederal');
	AddFederalInfo (oTBody, 'Total deductions for EI, CPP and Federal Tax', TotDED, 'TblFederalTotal');

	if (LastElem1 == 0)
	{
	  oTableFederal.appendChild(oTable);
	}
	else
	{
	  oTableFederal.replaceChild(oTable, LastElem1);
	} 
	LastElem1 = oTable;

	var oTable = document.createElement("TABLE");
	var oTHead = document.createElement("THEAD");
	var oTBody = document.createElement("TBODY");
	var oTFoot = document.createElement("TFOOT");
	var oCaption = document.createElement("CAPTION");

	oTable.appendChild(oTHead);
	oTable.appendChild(oTBody);
	oTable.appendChild(oTFoot);
	oTable.appendChild(oCaption);

	oTable.className='TblFormatProv';

	oRow = document.createElement("TR");

	AddHeader (oTHead, 'Province');
	AddHeader (oTHead, 'Total Fed_tax+EI+CPP');
	AddHeader (oTHead, 'Province tax');
	AddHeader (oTHead, 'Pers Amt');
	AddHeader (oTHead, 'Province Surtax');
	AddHeader (oTHead, 'Health premium');
	AddHeader (oTHead, 'Net Income');
	AddHeader (oTHead, 'Marginal NET .gain from $1');

	for (t=3; t<ProvList.length; t++)
	{
	  CDed = FormatAmt (CalcTax (ProvList[t][0], Amt));
	  BasDED = FormatAmt (ProvList[t][0][0][0] * (ProvList[t][2] + EIAmt + CPPAmt) / 100);
	  CDed = FormatAmt (CDed - BasDED);

	  SurTax = FormatAmt (CalcSurTax  (ProvList[t][3], CDed));
	  HealthPrem =  FormatAmt (CalcHealthPrem (ProvList [t][4], Amt));

	  oRow = document.createElement("TR");

	  if (Math.round(t/2) * 2 == t)
	  {oRow.className ='TblRowEven'}
	  else
	  {oRow.className ='TblRowOdd'};

	  oTBody.appendChild(oRow);
	  
	  AddCell (oCell, oRow, ProvList[t][1], oRow.className + 'Prov');

	  AddCell (oCell, oRow, TotDED, oRow.className);
	  AddCell (oCell, oRow, FormatAmt (CDed + BasDED), oRow.className);
	  AddCell (oCell, oRow, BasDED, oRow.className);
	  AddCell (oCell, oRow, SurTax, oRow.className);
	  AddCell (oCell, oRow, HealthPrem, oRow.className);
	  AddCell (oCell, oRow, FormatAmt(Amt - (TotDED + CDed + SurTax + HealthPrem)), oRow.className);

	  Amt2 = Amt + 1
	  FEDAmt2 = CalcTax (FED, Amt2);
	  EIAmt2 = CalcTax (EI, Amt2);
	  CPPAmt2 = CalcTax (CPP, Amt2);

	  FedDED2 = ProvList[0][0][0][0] * (ProvList[0][2] + EIAmt2 + CPPAmt2) / 100;
	  TotDED2 = FormatAmt (FEDAmt2 + EIAmt2 + CPPAmt2 - FedDED2);

	  CDed2 = FormatAmt (CalcTax (ProvList[t][0], Amt2));
	  BasDED2 = FormatAmt (ProvList[t][0][0][0] * (ProvList[t][2] + EIAmt2 + CPPAmt2) / 100);
	  CDed2 = FormatAmt (CDed2 - BasDED2);

	  SurTax2 = FormatAmt (CalcSurTax  (ProvList[t][3], CDed2));
	  HealthPrem2 =  FormatAmt (CalcHealthPrem (ProvList [t][4], Amt2));

	  Diff = (Amt2 - (TotDED2 + CDed2 + SurTax2 + HealthPrem2)) - (Amt - (TotDED + CDed + SurTax + HealthPrem));
	  AddCell (oCell, oRow, FormatAmt(Diff), oRow.className);
	}

	if (LastElem2 == 0)
	{
	  oTablePRovince.appendChild(oTable);
	}
	else
	{
	  oTablePRovince.replaceChild(oTable, LastElem2);
	} 
	  LastElem2 = oTable;

	}

	function CalcTax (Prov, Amt) {
	res = 0; 

	for (i=0; i<Prov.length; i++) {
	  if (Prov [i][1] == 1000000) {
		c = Amt;
		Amt = 0;
	  } else {
		c = Math.min (Amt, Prov [i][1]);
		Amt = Amt - c;
	  }
	  res = res + c * Prov [i][0]/100;
	}
	return (res);
	}

	function CalcSurTax (ProvTbl, TaxAmt) {
	res = 0; 

	for (i=0; i<ProvTbl.length; i++) {
	  if (TaxAmt >= ProvTbl[i][1]) 

	{
		res = ((TaxAmt - ProvTbl[i][1]) * ProvTbl [i][0]) / 100;
	}
	}

	return (res);
	}

	function CalcHealthPrem (ProvTbl, TaxAmt) {
	res = 0; 

	for (i=0; i<ProvTbl.length; i++) {
	  if (TaxAmt >= ProvTbl[i][0]) 
	 {
		res = (TaxAmt - ProvTbl [i][0]) * ProvTbl [i][2] / 100 + ProvTbl [i][1];
	//    alert (TaxAmt);
	 }
	}
	return Math.round (res);
	}

	function IncreaseIncome (Increase)
	{
	  document.form.Income.value = FormatAmt (document.form.Income.value * (FormatAmt (Increase) + 100) / 100);
	  ShowTable(document.form.Income.value);
	}

	</script>

	<link rel=stylesheet type="text/css" href="src/tax.css">
</HEAD>

<BODY onload='javascript:ShowTable(document.form.Income.value);'>


<form name="form" method="POST">

<table border="0">
    <tr>
        <td class='IncEntry'>Enter your income:</td>
        <td>
            <input type="text" size="10" name="Income" value="50000" class='IncEntry'>
        </td>
        <td class='Space1'>&nbsp;</td>
        <td class='IncEntry2'>Increase income by [%] :</td>
        <td>
            <input type="text" size="5" name="Increase" value="3" class='IncEntry2'>
        </td>
        <td class='IncEntry'><input type="button" class='IncEntry2' name="B2" value="Increase"  OnClick="IncreaseIncome (document.form.Increase.value);"></td>
    </tr>
</table>

<input type="button" class='IncEntry' name="B1" value="Calculate Deductions"  OnClick="ShowTable(document.form.Income.value);">
</form>

<br>

<table>
<tr><td>
<DIV ID="oTableFederal">&nbsp;</DIV>
</td>
<td class='Space1'>&nbsp;</td>
<td>
	<table><tr>
	<td><a href="SWDeal.html" class='ImgLink'><img src="src/adv.gif" width="391"height="81" alt="" hspace="0" border="0"></a></td>
	</tr><tr>
	<td><a href="../CarAgenda/index.html" target="_car"><img src="src/car3.gif" width="370" height="90" alt="" border="0"></a></td>
	</tr></table>
</td></tr></table>
<br><br>
<DIV ID="oTablePRovince">&nbsp;</DIV>


<!-- ---------------------------------------------------------------------------------------   
                                                 tax.js
     ---------------------------------------------------------------------------------------  -->

NullArr = new Array (0)


var i = 0

function addRate (Arr, Perc, Max) {
  Arr[i]  = new Array (2)
  Arr [i][0] = Perc
  Arr [i][1] = Max

  i++;
}


FED = new Array (4)
i = 0;
addRate (FED, 16, 35595);
addRate (FED, 22, 35595);
addRate (FED, 26, 44549);
addRate (FED, 29, 1000000);

NL = new Array (3)
i = 0;
addRate (NL, 10.57, 29590);
addRate (NL, 16.16, 29590);
addRate (NL, 18.02, 1000000);

PE = new Array (3)
i = 0;
addRate (PE, 9.8, 30754);
addRate (PE, 13.8, 30755);
addRate (PE, 16.7, 1000000);



NS = new Array (4)
i = 0;
addRate (NS, 8.79, 29590);
addRate (NS, 14.95, 29590);
addRate (NS, 16.67, 33820);
addRate (NS, 17.5, 1000000);

NB = new Array (4)
i = 0;
addRate (NB, 9.68, 32730);
addRate (NB, 14.82, 32732);
addRate (NB, 16.52, 40965);
addRate (NB, 17.84, 1000000);

ON = new Array (3)
i = 0;
addRate (ON, 6.05, 34010);
addRate (ON, 9.15, 34010);
addRate (ON, 11.16, 1000000);

MB = new Array (3)
i = 0;
addRate (MB, 10.9, 30544);
addRate (MB, 14, 34456);
addRate (MB, 17.4, 1000000);

SK = new Array (3)
i = 0;
addRate (SK, 11, 36770);
addRate (SK, 13, 68286);
addRate (SK, 15, 1000000);

AB = new Array (1)
i = 0;
addRate (AB, 10, 1000000);

BC = new Array (5)
i = 0;
addRate (BC, 6.05, 33061);
addRate (BC, 9.15, 33062);
addRate (BC, 11.7, 9764);
addRate (BC, 13.7, 16268);
addRate (BC, 14.7, 1000000);

YT = new Array (4)
i = 0;
addRate (YT, 7.04, 35595);
addRate (YT, 9.68, 35595);
addRate (YT, 11.44, 44549);
addRate (YT, 12.76, 1000000);

NT = new Array (4)
i = 0;
addRate (NT, 5.9, 33811);
addRate (NT, 8.6, 33811);
addRate (NT, 12.2, 42317);
addRate (NT, 14.05, 1000000);

NU = new Array (4)
i = 0;
addRate (NU, 4, 35595);
addRate (NU, 7, 35595);
addRate (NU, 9, 44594);
addRate (NU, 11.5, 1000000);


EI = new Array (2)
i = 0;
addRate (EI, 1.95, 39000);
addRate (EI, 0, 1000000);

CPP = new Array (2)
i = 0;
addRate (CPP, 4.95, 41100 - 3500);
addRate (CPP, 0, 1000000);




ONST = new Array (2)
i = 0;
addRate (ONST, 20, 3929);
addRate (ONST, 56, 4957);


NLST = new Array (1)
i = 0;
addRate (NLST, 9, 7032);

PEST = new Array (1)
i = 0;
addRate (PEST, 10, 5200);

NSST = new Array (1)
i = 0;
addRate (NSST, 10, 10000);

YTST = new Array (1)
i = 0;
addRate (YTST, 5, 6000);




function addHealth (PrArr, Bracket, MinAmt, Perc) {

  PrArr [i]  = new Array (3)
  PrArr [i][0] = Bracket
  PrArr [i][1] = MinAmt
  PrArr [i][2] = Perc
  i++;
}


ONHlt = new Array (10)
i = 0;

addHealth (ONHlt, 20000, 0, 6);
addHealth (ONHlt, 25000, 300, 0);
addHealth (ONHlt, 36000, 300, 6);
addHealth (ONHlt, 38500, 450, 0);
addHealth (ONHlt, 48000, 450, 25);
addHealth (ONHlt, 48600, 600, 0);
addHealth (ONHlt, 72000, 600, 25);
addHealth (ONHlt, 72600, 750, 0);
addHealth (ONHlt, 200000, 750, 25);
addHealth (ONHlt, 200600, 900, 0);


ABHlt = new Array (1)
i = 0;

addHealth (ABHlt, 0, 1056, 0);



i = 0;

function addProv (Prabbr, PrName, PersAmt, SurTax, Health) {
  ProvList [i]  = new Array (5)
  ProvList [i][0] = Prabbr
  ProvList [i][1] = PrName
  ProvList [i][2] = PersAmt
  ProvList [i][3] = SurTax
  ProvList [i][4] = Health
  i++;
}

ProvList = new Array (15)

addProv (FED, 'Federal Tax', 8148, '', '');
addProv (EI, 'Employment Insurance', 0, '', '');
addProv (CPP, 'CPP', 0, '', '');
addProv (NL, 'Newfoundland and Labrador', 7410, NLST, NullArr);
addProv (PE, 'Prince Edward Island', 7412, PEST, NullArr);
addProv (NS, 'Nova Scotia', 7231, NSST, NullArr);
addProv (NB, 'New Brunswick', 7888, NullArr, NullArr);
addProv (ON, 'Ontario', 8196, ONST, ONHlt);
addProv (MB, 'Manitoba', 7634, NullArr, NullArr);
addProv (SK, 'Saskatchewan', 8404, NullArr, NullArr);
addProv (AB, 'Alberta', 14523, NullArr, ABHlt);
addProv (BC, 'British Columbia', 8676, NullArr, NullArr);
addProv (YT, 'Yukon', 8148, YTST, NullArr);
addProv (NT, 'Northwest Territories', 11609, NullArr, NullArr);
addProv (NU, 'Nunavut', 10674, NullArr, NullArr);