var currentMonth = 0;
var currentYear = 0;
function days_after(selectedDate, numDays) {
// parse s for month, day, year
var dateArray = selectedDate.split('/');
sdate = new Date(dateArray[2],dateArray[0]-1,dateArray[1]);
var odate = new Date(sdate.getTime() + (numDays * 86400000));
currentMonth = odate.getMonth() + 1;
currentYear = odate.getYear();
return (odate.getMonth()+1) + '/' + odate.getDate() + '/' + odate.getYear();
}
function validNums(refVal) {
var bValid=true;
for (var i=0; i < refVal.value.length; i++) {
var c = refVal.value.charCodeAt(i);
if ((c > 57 || c < 48)) {
bValid=false;
}
}
if (bValid==false) {
alert('You can only enter numbers into this field.');
// refVal.value="";
refVal.focus();
refVal.select();
return false;
}
else {
return true; }
}
function validNumsDec(refVal) {
var decm = false;
var bDec = true;
var bValid = true;
for (var i=0; i < refVal.value.length; i++) {
var c = refVal.value.charCodeAt(i);
if ((c > 57 || c < 48)) {
if (c==46) {
if (decm == true) {
var bDec = false; }
else {
decm = true; } }
else if (c==44) { }
else {
bValid = false; }
}
}
if (bValid==false || bDec==false) {
alert('You can only enter numbers, commas and one decimal into this field.');
refVal.focus();
refVal.select();
return false;
}
else return true;
}
function formatNum(num) {
num = parseFloat(num);
num = Math.round(100*num);
num = num.toString();
var p1 = num.substring(0, num.length - 2);
var p2 = num.substring(num.length - 2, num.length);
num = p1 + '.' + p2;
var txtNumber = '' + num;
var rxSplit = new RegExp('([0-9])([0-9][0-9][0-9][,.])');
var arrNumber = txtNumber.split('.');
arrNumber[0] += '.';
do {
arrNumber[0] = arrNumber[0].replace(rxSplit, '$1,$2');
} while (rxSplit.test(arrNumber[0]));
if (arrNumber.length > 1) {
return arrNumber.join('');
}
else {
return arrNumber[0].split('.')[0];
}
}
function computeForm(form) {
if(document.mortCal.principal.value == "" || document.mortCal.principal.value == 0) {
alert("Please enter an amount in Line #1.");
document.mortCal.principal.focus();
} else
if(document.mortCal.intRate.value == "" || document.mortCal.intRate.value == 0) {
alert("Please enter an amount in Line #2.");
document.mortCal.intRate.focus();
} else
if(document.mortCal.numYears.value == "" || document.mortCal.numYears.value == 0) {
alert("Please enter an amount in Line #3.");
document.mortCal.numYears.focus();
} else {
//COMPUTE MIF
var payFreq = document.mortCal.payFreq.options[document.mortCal.payFreq.selectedIndex].value;
if(document.mortCal.intRate.value < 1) {
var annInt = document.mortCal.intRate.value * 100;
} else {
var annInt = document.mortCal.intRate.value;
}
var MIFfactor1 = 2 * 100;
var MIFfactor2 = annInt / MIFfactor1;
var MIFfactor3 = eval(MIFfactor2) + eval(1);
var MIFfactor4 = Math.pow(MIFfactor3,2);
var MIFfactor5 = 1 /payFreq;
var MIFfactor6 = Math.pow(MIFfactor4,MIFfactor5);
var MIFfactor7 = eval(MIFfactor6) - eval(1);
var MIF = MIFfactor7;
//COMPUTE PIP
var prin = document.mortCal.principal.value;
var noYrs = document.mortCal.numYears.value;
var PIPfactor1 = eval(MIF) + eval(1);
var PIPfactor2 = eval(noYrs) - eval(noYrs * 2);
var PIPfactor3 = PIPfactor2 * payFreq;
var PIPfactor4 = Math.pow(PIPfactor1,PIPfactor3);
var PIPfactor5 = eval(1) - eval(PIPfactor4);
var PIPfactor6 = prin * MIF;
var PIPfactor7 = PIPfactor6 / PIPfactor5;
var PIP = PIPfactor7;
document.mortCal.moPmt.value = formatNum(PIP);
document.mortCal.amortYrs.selectedIndex = document.mortCal.termLength.value;
for (counter = 0; counter < document.mortCal.length; counter ++) {
if (document.mortCal[counter].value == 'N.aN') { document.mortCal[counter].value = ''; }
}
}
}
function validate() {
var MAX_PRINCIPAL = 2000000; var MIN_PRINCIPAL = 5000;
var MAX_INTRATE = 13; var MIN_INTRATE = 1;
var MAX_TERM = 10; var MIN_TERM = 1;
var MAX_PERIOD = 30; var MIN_PERIOD = 1;
var PRINCIPAL = Number(document.mortCal.principal.value);
var INTRATE = Number(document.mortCal.intRate.value);
var TERM = Number(document.mortCal.termLength.value);
var PERIOD = Number(document.mortCal.numYears.value);
if (PRINCIPAL > MAX_PRINCIPAL) {
alert('The principal amount you have entered is too high. Please reduce it before proceeding.');
document.mortCal.principal.focus(); document.mortCal.principal.select();
return false; }
if (INTRATE > MAX_INTRATE) {
alert('The interest rate you have entered is too high. Please reduce it before proceeding.');
document.mortCal.intRate.focus(); document.mortCal.intRate.select();
return false; }
if (TERM > MAX_TERM) {
alert('The term length you have entered is too high. Please reduce it before proceeding.');
document.mortCal.termLength.focus(); document.mortCal.termLength.select();
return false; }
if (PERIOD > MAX_PERIOD) {
alert('The amortization period length you have entered is too high. Please reduce it before proceeding.');
document.mortCal.numYears.focus(); document.mortCal.numYears.select();
return false; }
if (PRINCIPAL < MIN_PRINCIPAL) {
alert('The principal amount you have entered is too low. Please increase it before proceeding.');
document.mortCal.principal.focus(); document.mortCal.principal.select();
return false; }
if (INTRATE < MIN_INTRATE) {
alert('The interest rate you have entered is too low. Please increase it before proceeding.');
document.mortCal.intRate.focus(); document.mortCal.intRate.select();
return false; }
if (TERM < MIN_TERM) {
alert('The term length you have entered is too low. Please increase it before proceeding.');
document.mortCal.termLength.focus(); document.mortCal.termLength.select();
return false; }
if (PERIOD < MIN_PERIOD) {
alert('The amortization period length you have entered is too low. Please increase it before proceeding.');
document.mortCal.numYears.focus(); document.mortCal.numYears.select();
return false; }
if (TERM > PERIOD) {
alert('Your term exceeds your amortization period. Please reduce the term below the period.');
document.mortCal.termLength.focus(); document.mortCal.termLength.select();
return false; }
return true;
}
function createReport(form) {
//GRAB VARIABLES
var freqTxt = document.mortCal.payFreq.options[document.mortCal.payFreq.selectedIndex].text;
var payFreq = document.mortCal.payFreq.options[document.mortCal.payFreq.selectedIndex].value;
//COMPUTE MIF
if(document.mortCal.intRate.value < 1) {
var annInt = document.mortCal.intRate.value * 100;
} else {
var annInt = document.mortCal.intRate.value;
}
var MIFfactor1 = 2 * 100;
var MIFfactor2 = annInt / MIFfactor1;
var MIFfactor3 = eval(MIFfactor2) + eval(1);
var MIFfactor4 = Math.pow(MIFfactor3,2);
var MIFfactor5 = 1 /payFreq;
var MIFfactor6 = Math.pow(MIFfactor4,MIFfactor5);
var MIFfactor7 = eval(MIFfactor6) - eval(1);
var MIF = MIFfactor7;
//COMPUTE PIP
var prin = document.mortCal.principal.value;
var noYrs = document.mortCal.numYears.value;
var PIPfactor1 = eval(MIF) + eval(1);
var PIPfactor2 = eval(noYrs) - eval(noYrs * 2);
var PIPfactor3 = PIPfactor2 * payFreq;
var PIPfactor4 = Math.pow(PIPfactor1,PIPfactor3);
var PIPfactor5 = eval(1) - eval(PIPfactor4);
var PIPfactor6 = prin * MIF;
var PIPfactor7 = PIPfactor6 / PIPfactor5;
var PIP = PIPfactor7;
document.mortCal.moPmt.value = formatNum(PIP);
//CALCULATE AMORT
var aPrin = prin;
var aIntRate = MIF;
var aNPer = noYrs * payFreq;
var aPmt = PIP;
var aIntPort = 0;
var aAccumInt = 0;
var aPrinPort = 0;
var aAccumPrin = 0;
var aCount = 0;
var aPmtRow = "";
var aPmtNum = 0;
//var today = new Date();
//var dayFactor = today.getTime();
//var pmtDay = today.getDate();
//var loanMM = today.getMonth() + 1;
//var loanYY = today.getYear();
//ADDITION
var Vmonth = Number(document.mortCal.month.selectedIndex) + 1;
var Vday = Number(document.mortCal.day.selectedIndex) + 1;
var Vyear = Number(document.mortCal.year.selectedIndex) + 1990;
var Vterm = Number(document.mortCal.termLength.value);
var loanDate = (Vmonth + "/" + Vday + "/" + Vyear);
//var monthMS = 86400000 * 30.4;
//var pmtDate = 0;
var PayFreqTime = 1;
if (payFreq == 1) { PayFreqTime = 12; }
else if (payFreq == 2) { PayFreqTime = 6; }
else if (payFreq == 4) { PayFreqTime = 3; }
else if (payFreq == 12) { PayFreqTime = 1; }
else if (payFreq == 26) { var numDays = 14; }
else if (payFreq == 52) { var numDays = 7; }
var numDisplay = Number(document.mortCal.amortYrs.selectedIndex) * payFreq;
var dayCount = 0;
var yearCount = 0;
var totalDayCount = 0;
var makeRow = false;
var makeTermRow = false;
var makeYearRow = false;
var lastYear = Vyear;
var termCount = Vterm;
var yearTotalPrin = new Array();
var yearTotalInt = new Array();
var yearTotalBalance = new Array();
currentMonth = Vmonth;
while(aCount < aNPer) {
aIntPort = aPrin * aIntRate;
aAccumInt = eval(aAccumInt) + eval(aIntPort);
aPrinPort = eval(aPmt) - eval(aIntPort);
aAccumPrin = eval(aAccumPrin) + eval(aPrinPort);
aPrin = eval(aPrin) - eval(aPrinPort);
aCount = eval(aCount) + eval(1);
aPmtNum = eval(aPmtNum) + eval(1);
if (payFreq >= 26) {
dayCount += numDays;
totalDayCount += numDays;
if (dayCount > 28 || (dayCount >=21 && numDays == 14)) {
pmtString = days_after(Vmonth + "/" + Vday + "/" + Vyear, totalDayCount);
if ((Vmonth == currentMonth && lastYear != currentYear) || (lastYear != currentYear && numDays == 7)) {
if (termCount != 0) { termCount --; }
makeRow = false; makeTermRow = false; makeYearRow = true; lastYear = currentYear; }
else {
makeYearRow = false;
if (termCount == 0) { makeRow = true; } else { makeTermRow = true; } }
dayCount = 0; }
else { makeRow = false; makeTermRow = false; }
}
else {
Vmonth += PayFreqTime;
if(Vmonth > 12) {
Vmonth = Vmonth - 12;
Vyear = Vyear + 1; }
if (termCount == 0) { makeRow = true; } else { makeTermRow = true; }
if (Vterm == 777 && termCount != 0) { termCount --; }
makeYearRow = false;
pmtString = (Vmonth + "/" + Vday + "/" + Vyear);
if (lastYear != Vyear && Vmonth == currentMonth) {
makeYearRow = true; makeRow = false; makeTermRow = false;
if (termCount != 0) { termCount --; }
}
}
if (makeTermRow == true) {
if (numDisplay > 0) { aPmtRow = ("" + aPmtRow + "| " + aPmtNum + " | " + pmtString + " | $" + formatNum(aPrinPort) + " | $" + formatNum(aIntPort) + " | $" + formatNum(aPrin) + " |
"); }
makeRow = false; }
else if (makeYearRow == true) {
if (numDisplay > 0) { aPmtRow = ("" + aPmtRow + "| " + aPmtNum + " | " + pmtString + " | $" + formatNum(aPrinPort) + " | $" + formatNum(aIntPort) + " | $" + formatNum(aPrin) + " |
");
aPmtRow = ("" + aPmtRow + "| --- | YTD Total | $" + formatNum(aAccumPrin) + " | $" + formatNum(aAccumInt) + " |
"); }
yearCount ++;
yearTotalPrin[yearCount] = aAccumPrin;
yearTotalInt[yearCount] = aAccumInt;
yearTotalBalance[yearCount] = aPrin;
makeYearRow = false; }
else if (makeRow == true) {
if (numDisplay > 0) { aPmtRow = ("" + aPmtRow + "| " + aPmtNum + " | " + pmtString + " | $" + formatNum(aPrinPort) + " | $" + formatNum(aIntPort) + " | $" + formatNum(aPrin) + " |
"); }
makeTermRow = false; }
if (numDisplay != 0) { numDisplay --; }
}
var pageStart = 'Mortgage Amortization Schedule';
var hdr = '| Mortgage Amortization Schedule Generator |  |
| The Mortgage Amortization Schedule Generator illustrates the monthly payment schedule for mortgage payments. |
';
var part1 = '';
var pageEnd = '';
var schedule = (pageStart + "" + hdr + "" + part1 + "" + part2 + "" + part3 + "" + part4 + "" + pageEnd + "");
document.body.innerHTML="";
document.body.innerHTML= schedule;
//reportWin = window.open("","","width=580,height=500,toolbar=yes,resize=yes,menubar=yes,scrollbars=yes");
//reportWin.document.write(schedule);
//reportWin.document.close();
}
function clearForm(form) {
document.mortCal.principal.value = "";
document.mortCal.intRate.value = "";
document.mortCal.numYears.value = "";
document.mortCal.moPmt.value = "";
}
