window.onerror=null bState = true oReq = new Collection("AMOUNT","RATE","","","","") oVal = new Collection("AMOUNT","RATE","","","","") oTst = new Collection("N","N","","","","") function controller(oForm, oBtn) { while (bState) { if (!Required(oForm)) break if (!Validate(oForm)) break if (!SetValue(oForm)) break if (!NewPage(oForm, oBtn)) break if (bState) { bState = false } } bState = true } function Required(oView) { for (i in oView) { for (j in oReq) { if (i==oReq[j]) { if (isMissing(oView[i])) { return(false) } } } } return(true) } function Validate(oView) { for (i in oView) { for (j in oVal) { if (i==oVal[j] && oTst[j]=="N") { if (isTest(oView[i], oTst[j])) { return(false) } } } } return(true) } function SetValue(oView) { Mortgage = new Loan(oView.AMOUNT.value, oView.RATE.value, get_selection(oView.YEARS), 0, 0, get_selection(oView.FREQUENCY), 0 ) Mortgage.calcPeriods() Mortgage.calcPayment() Mortgage.calcInterest() oView.PAYMENT.value = calcRound(Mortgage.Payment) oView.INTEREST.value = calcRound(Mortgage.Interest) setCookie("_Prin", Mortgage.Amount) setCookie("_Int", Mortgage.Rate) setCookie("_Year", Mortgage.Term) setCookie("_Tot", Mortgage.Interest) return(true) } function isMissing(oCtrl) { if (oCtrl.value == "") { alert("You have left a required value blank. Please enter a value.") oCtrl.focus() oCtrl.select() return(true) } else { return(false) } } function isTest(oCtrl, oTest) { if (oTest=="N" && !isNumber(oCtrl.value) ) { alert(oCtrl.value+" contains an invalid character. Please enter a number") oCtrl.focus() oCtrl.select() return(true) } else { return(false) } } function isNumber(input) { for (var i=0;i "9") { if (oneChar != "." ) { return(false) } } } return(true) } function Collection(item1, item2, item3, item4, item5, item6) { this.item1 = item1 this.item2 = item2 this.item3 = item3 this.item4 = item4 this.item5 = item5 this.item6 = item6 } function Loan(Amount, Rate, Term, Payment, Interest, Frequency, Periods ) { this.Amount = Amount this.Rate = Rate this.Term = Term this.Payment = Payment this.Interest = Interest this.Frequency = Frequency this.Periods = Periods this.calcPeriods = calcPeriods this.calcPayment = calcPayment this.calcInterest = calcInterest } function calcPayment() { this.Payment = (this.Amount*((this.Rate/(this.Periods*100))/(1-(Math.pow(1+(this.Rate/(this.Periods*100)),((this.Term*this.Periods)*-1)))))) } function calcInterest() { this.Interest = ((this.Payment*(this.Term*this.Periods))-this.Amount) } function calcPeriods() { if (this.Frequency=="Monthly") { this.Periods=12 } else { this.Periods=26 } } function calcRound(num) { result="$"+Math.floor(num)+"." n = result.length if (num>1000 && num<999999) { result="$"+result.substring(1,n-4)+","+result.substring(n-4,n) } if (num>1000000) { result = "$"+result.substring(1,n-7)+","+result.substring(n-7,n-4)+","+result.substring(n-4,n) } var cents=100*(num-Math.floor(num))+0.5 result += Math.floor(cents/10) result += Math.floor(cents%10) return(result) } function select_item(name, value) { this.name = name this.value = value } function get_selection(select_object) { contents = new select_item() for(var i=0;iMortgage Amortization Schedule - Credit and Finance Rick Analysis"); text = (text +"
Credit

"); text = (text +"
  Mortgage Amortization Schedule
"); text = (text + "
Mortgage Amount: " +calcRound(Mortgage.Amount)); text = (text + "
Interest Rate: " + Mortgage.Rate + " %"); text = (text +"
Mortgage Term: " +get_selection(oForm.YEARS) + " Years "); text = (text +"

"); text = (text +"\n"); makeTable(oForm) text = (text +"
Year Interest   Principal  Balance   
"); msgWindow=window.open("","displayWindow","top=10,left=10,toolbar=yes,width=800,height=500,directories=yes,status=yes,scrollbars=yes,resize=yes,menubar=yes") msgWindow.document.write(text) msgWindow.document.close() return(true) } return(false) } function makeTable(oView) { var currInt = 0 var currPrin = 0 prevBalance = Mortgage.Amount InterestRate = ( Mortgage.Rate /100) / Mortgage.Periods MonthlyPayment = Mortgage.Payment currStart = get_selection(oView.START) for(i=1;i<=30;i++) { for(j=1;j<=Mortgage.Periods;j++) { periodInt = prevBalance * InterestRate periodPrin = MonthlyPayment - periodInt currBal = prevBalance - periodPrin currInt += periodInt currPrin += periodPrin prevBalance = currBal } if( currBal <= 0 ){ currBal = 0 } text = (text +""+ currStart +""+ calcRound(currInt) +" "+ calcRound(currPrin) +" "+ calcRound(currBal)+" "); currInt = 0 currPrin = 0 currStart = parseInt(currStart) currStart += 1 if(currBal<=0) { return(true) } } return (true) } function setfocus() { document.MORTGAGE.AMOUNT.focus() document.MORTGAGE.AMOUNT.select() } // clears field of default value function clear_field(field) { if (field.value==field.defaultValue) { field.value='' } }