function ShowHelpForSimpleCalc(divID, desc) { DivObj = document.getElementById(divID); DivObj.style.display = 'inline'; DivObj.style.position = 'absolute'; DivObj.style.width = '170'; DivObj.style.backgroundColor = 'lightyellow'; DivObj.style.border = 'dashed 1px black'; DivObj.style.padding = '10px'; DivObj.innerHTML = '
' + desc + '
'; } function OpenWinForPrintOfSimpleChart() { var content = document.getElementById('SimpleAmortChart').innerHTML; top.consoleRef = window.open('','SimpleCalCultaorConsole', 'width=350,height=250,menubar=0,toolbar=0,status=0,scrollbars=1,resizable=1') top.consoleRef.document.writeln('Simple Calculator Amortization ChartConsole'+content+''); top.consoleRef.document.close(); } function HideHelpForSimpleCalc(divID) { DivObj = document.getElementById(divID); DivObj.style.display = 'none'; } function FnCheckAndCalculate(frmObj) { var _msgText = ''; var LoanAmount, Year, Month, InterestRate, Points, PointsValue, PaymentFrequency; //This is to check if value is given if(frmObj.LoanAmount.value=='') { _msgText += "* Please give the asking price.\n"; } else if(isNaN(LoanAmount=parseFloat(frmObj.LoanAmount.value))) { _msgText += "* Please give the asking price in digits only.\n"; } if(frmObj.DownPaymentAmount.value=='') { _msgText += "* Please give the Down payment amount.\n"; } else if(isNaN(DownPaymentAmount=parseFloat(frmObj.DownPaymentAmount.value))) { _msgText += "* Please give the down payment amount in digits only.\n"; } if(frmObj.Year.value=='' && frmObj.Month.value==0) { _msgText += "* Please provide the term of loan(Loan period).\n"; } else if(isNaN(Year=parseInt(frmObj.Year.value))) { _msgText += "* Please give year in digits only.\n"; } if(frmObj.InterestRate.value=='') { _msgText += "* Please give the interest rate.\n"; } else if(isNaN(InterestRate=parseFloat(frmObj.InterestRate.value))) { _msgText += "* Please give interest rate in digits only.\n"; } Month = parseInt(frmObj.Month.options[frmObj.Month.selectedIndex].value); if(_msgText=='') { LoanAmount = LoanAmount - DownPaymentAmount; FnCalculateTheInterest(LoanAmount, Year, Month, InterestRate); } else { alert(_msgText); } return false; } function FnCalculateTheInterest(LoanAmount, Year, Month, InterestRate) { var NumberOfMonths = (Year * 12)+Month; var InterestRatePerMonth = ((InterestRate/100)/12); var tmp = (1+InterestRatePerMonth); var InterestPerMonth = Math.pow(tmp,NumberOfMonths); var MonthlyInstallment = ((LoanAmount * InterestPerMonth * InterestRatePerMonth) / (InterestPerMonth - 1)); if(LoanAmount <= 0 || InterestRatePerMonth <= 0 || NumberOfMonths <= 0) { var HtmlToDisplay ='
Sorry, invalid data.
'; } var HtmlToDisplay = '
'; HtmlToDisplay += ''; HtmlToDisplay += '
Monthly Installment: $ '+(Math.round(MonthlyInstallment*100)/100)+'
'; document.getElementById('SimplePrintRst').innerHTML = '  '; document.getElementById('SimpleInterestRate').innerHTML = HtmlToDisplay; document.getElementById('SimpleAmortChart').innerHTML = ''; document.getElementById('SimpleAmortChart').style.overflow = ''; return false; } function FnCalculateTheAmortizationChart(LoanAmount, InterestRate, InterestRatePerMonth, NumberOfMonths, MonthlyInstallment) { var InterestPaid = 0; var PrincipalPaid = 0; var AmortizationTable = ''; AmortizationTable += ''; var DateString = ''; var Count = 0; var TodayDate = new Date(); var lastYear = TodayDate.getFullYear(); var lastmonth = TodayDate.getMonth(); var CurrentDay = TodayDate.getDate(); while(LoanAmount > 0) { InterestPaid = (InterestRate * LoanAmount)/(1200); PrincipalPaid = MonthlyInstallment - InterestPaid; LoanAmount = ((LoanAmount - MonthlyInstallment)>0) ? (LoanAmount - MonthlyInstallment) + InterestPaid : (LoanAmount - MonthlyInstallment); Count++; if(lastmonth>=12) { lastmonth = 1; lastYear = lastYear + 1; } else { lastmonth++; } DateString = lastYear + "-" + lastmonth + "-" + CurrentDay; AmortizationTable += ''; } AmortizationTable += ''; document.getElementById('SimplePrintRst').innerHTML = '  '; document.getElementById('SimpleAmortChart').style.overflow = 'scroll'; document.getElementById('SimpleAmortChart').innerHTML = AmortizationTable; } function ResetCalculator() { document.getElementById('SimplePrintRst').innerHTML = '  '; document.getElementById('SimpleInterestRate').innerHTML = FnGetInitialCalculatorHtmlCode(); document.getElementById('SimpleAmortChart').innerHTML = ''; document.getElementById('SimpleAmortChart').style.overflow = ''; } function FnGetInitialCalculatorHtmlCode() { var InitialCalculatorHtmlCode = '
Simple Loan Payment - Amortization Chart
Pmt #DatePrinc PaidInt PaidBalance
'+Count+''+DateString+''+(Math.round(PrincipalPaid*100)/100)+''+(Math.round(InterestPaid*100)/100); if(LoanAmount <= 0) { AmortizationTable +=' Paid'; } else { AmortizationTable +=''+(Math.round(LoanAmount*100)/100); } AmortizationTable +='
Monthly Installment
'; return InitialCalculatorHtmlCode; } function FnCreateCalculatorForm() { if(document.getElementById('SimpleCalculatorHomeLink')=='http://www.mortgagefit.com/') { var HtmlCodeForForm = ''; HtmlCodeForForm += '
'; HtmlCodeForForm += ''; HtmlCodeForForm += ''; HtmlCodeForForm += ''; HtmlCodeForForm += '
Simple Loan Payment Calculator
'; HtmlCodeForForm += ''; HtmlCodeForForm += ''; HtmlCodeForForm += ''; HtmlCodeForForm += ''; HtmlCodeForForm += ''; HtmlCodeForForm += ''; HtmlCodeForForm += '
Asking Price?
Down Payment?
Interest Rate %?
Term in '; HtmlCodeForForm += ''; HtmlCodeForForm += ''; HtmlCodeForForm += '
Year(s)Month(s)
?
 
'+FnGetInitialCalculatorHtmlCode()+'
  
'; document.getElementById('SimpleCalculatorHomeLink').className = 'simplecalcsyndicate'; document.getElementById('SimpleCalculatorSection').innerHTML = HtmlCodeForForm; } else { document.getElementById('SimpleCalculatorSection').innerHTML = 'To enable this calculator, please paste the full code as described at MortgageFit'; } } document.write(''); FnCreateCalculatorForm();