function ich_saveCalc(amount,interestRate,term,extraPayments) { var winRef = window.open('','saveWindow','location=no,resizable=yes,scrollbars=yes,width=500,height=500,left=400,top=100'); var s = ' '; s = ich_makeReport(amount,interestRate,term,extraPayments); winRef.document.write(s); winRef.document.close(); } function ich_makeReport(amount,interestRate,term,extraPayments) { var browserSupported = false; var browser = navigator.appName; var temp,version; if (browser=="Microsoft Internet Explorer") { if (navigator.appVersion.indexOf("MSIE")!=-1) { temp = navigator.appVersion.split("MSIE"); version = parseFloat(temp[1]); } if(version >= 5) { browserSupported = true; } } // generate the html page for the save table frame. var saveFrameStr = ich_saveHeader() + ""+ "
"+ "
"+ "

Amortisation Table

"+ "
"+ich_compute(amount,interestRate,term,extraPayments); // generate a html page consisting of the save button. var buttonFrameStr = ich_saveButtonPage(); // generate a html page consisting of 2 frames: top frame contains save table. // bottom frame contains save button. var str = ""+ ""+ "Principal & Interest Calculator Information"+ ""+ ""+ ""+ ""; return str; } function ich_MonthlyAmort(principal, years, apr, amort, extraPayments) { var str = ""; //msg=window.open("", "DisplayWindow","toolbar=no,scrollbars=yes,menubar=no,width=500,height=470"); var payments = years * 12; var monthlyInterest = apr/12; pennies = apr * 10000; pennies = Math.round(pennies); strPennies = "" + pennies; len = strPennies.length; interestRate = strPennies.substring(0, len - 2) + "." + strPennies.substring((len - 2), len); var monthlyPayment = ich_rounding(principal*monthlyInterest / (1 - (1 / Math.pow(1 + monthlyInterest, payments)))); str = str + "


"; if(extraPayments != 0) { str = str + ""; }else{ str = str + ""; } str = str + ""; principalPaid = 0; interestPaid = 0; //firstInt = monthlyInterest * principal; //avTotal = (firstInt + mthPmt)/principal * 1200 avTotal = 0 var counter = 0; for (var i = 1; i <= payments; i++) { var amortMod = i % amort; var interestPayment1 = principal * monthlyInterest; var intPay = (interestPayment1 + 12)/principal * 1200; avTotal = avTotal + intPay; pennies = interestPayment1 * 100; pennies = Math.round(pennies); strPennies = "" + pennies; len = strPennies.length; interestPayment = strPennies.substring(0, len - 2) + "." + strPennies.substring((len - 2), len); var principalPayment1 = monthlyPayment - interestPayment + (extraPayments*1); pennies = principalPayment1 * 100; pennies = Math.round(pennies); strPennies = "" + pennies; len = strPennies.length; principalPayment = strPennies.substring(0, len - 2) + "." + strPennies.substring((len - 2), len); principal1 = principal - principalPayment; if(principal1 < 0) { counter = 1; } pennies = principal1 * 100; pennies = Math.round(pennies); strPennies = "" + pennies; len = strPennies.length; principal = strPennies.substring(0, len - 2) + "." + strPennies.substring((len - 2), len); principalPaid1 = -(-principalPayment - principalPaid); pennies = principalPaid1 * 100; pennies = Math.round(pennies); strPennies = "" + pennies; len = strPennies.length; principalPaid = strPennies.substring(0, len - 2) + "." + strPennies.substring((len - 2), len); interestPaid1 = -(-interestPayment - interestPaid); pennies = interestPaid1 * 100; pennies = Math.round(pennies); strPennies = "" + pennies; len = strPennies.length; interestPaid = strPennies.substring(0, len - 2) + "." + strPennies.substring((len - 2), len); if(counter == 1) { principal = 0; } if (amortMod == 0) { if(i % 2 == 0) { str = str + ""; str = str + ""; } else { str = str + ""; str = str + ""; } } if(counter == 1) { break; } } avTotal = avTotal / (payments); str = str + "

$" + addCommas(principal) + " at " + interestRate + "% over a " + years + " year period.
Monthly payment: $" + addCommas(monthlyPayment) + " with extra payments: $"+extraPayments+"


$" + addCommas(principal) + " at " + interestRate + "% over a " + years + " year period.
Monthly payment: $" + addCommas(monthlyPayment) + "



Current PaymentTo Date
Payment
Number		InterestPrincipalInterest PaidPrincipal PaidBalance
" + i + "$" + addCommas(interestPayment) + "$" + addCommas(principalPayment) + "$" + addCommas(interestPaid) + "$" + addCommas(principalPaid) + "$" + addCommas(principal) + "
" + i + "$" + addCommas(interestPayment) + "$" + addCommas(principalPayment) + "$" + addCommas(interestPaid) + "$" + addCommas(principalPaid) + "$" + addCommas(principal) + "

"; return str; } function ich_compute(amount,rate,term,extraPayments) { apr = rate / 100.0; return ich_MonthlyAmort(amount, term, apr, 1, extraPayments); } function ich_rounding(n) { pennies = n * 100; pennies = Math.round(pennies); strPennies = "" + pennies; len = strPennies.length; return strPennies.substring(0, len - 2) + "." + strPennies.substring((len - 2), len); } function addCommas(nStr) { nStr += ''; x = nStr.split('.'); x1 = x[0]; x2 = x.length > 1 ? '.' + x[1] : ''; var rgx = /(\d+)(\d{3})/; while (rgx.test(x1)) { x1 = x1.replace(rgx, '$1' + ',' + '$2'); } return x1 + x2; }