var chko = 0; var no_temp = ""; var prtp = ""; var blnk = ""; var pfnl = ""; var instr = ""; var invNo = 0; var errNo = ""; var P = 0; var p = 0; var I = 0; var II = 0; var N = 0; var n = 0; function loanCalc(form) { var ntpr = form.years.value; var tmpr = form.amtLoan.value; var itpr = form.intRate.value; instr = tmpr; errNo = "Amount of Loan"; validNumber(); tmpr = instr; instr = itpr; errNo = "Annual Interest Rate"; validNumber(); itpr = instr; instr = ntpr; errNo = "Number of Years"; validNumber(); ntpr = instr; if (invNo == 1) { form.payment.value = ""; } else { P = parseFloat(tmpr); II = parseFloat(itpr); I = II / 100 / 12; N = parseFloat(ntpr); n = N * 12; if (n == 0) { standardOutput(P); form.payment.value = no_temp; } else { if (I == 0) { p = P/n; standardOutput(p); form.payment.value = no_temp; } else { p = -((-P * I * Math.pow((1 + I),n)) / (Math.pow((1 + I),n) - 1)); standardOutput(p); pfnl = no_temp; form.payment.value = pfnl; if (form.amortTable[1].checked) { makeTable(); } } } } } function makeTable() { standardOutput(P); var PP = no_temp; instr = document.calc.year1.value; errNo = "First Payment"; validNumber(); var year = parseFloat(instr); var month = document.calc.month1.selectedIndex; var firstMonth = month; var curMonth = ""; var prntMonth = ""; var balance = P; var prntBal = "" var prinPaid = 0; var prntPrin = "" var intPaid = 0; var prntInt = ""; var accumInt = 0; var dataWindow = window.open("","dataWindow","scrollbars,resizable,width=625,height=350"); if (dataWindow != null) { var data = ""; data += 'Amortization Schedule'; data += '
Loan Amortization '; data += 'Schedule
' + PP + ' at ' + II + '% '; data += 'for ' + N + ' years
Monthly Payment: ' + pfnl + ''; data += '


'; dataWindow.document.write(data); data = ""; data += '
'; data += ''; for (i = 0; i < n; i++) { curMonth = document.calc.month1.options[month].text; prntMonth = curMonth + blnk; prntMonth = prntMonth.substring(0,12); intPaid = balance * I; prntValue(intPaid,22); prntInt = prtp; accumInt += intPaid; prinPaid = p - intPaid; prntValue(prinPaid,22); prntPrin = prtp; balance -= prinPaid; prntValue(balance,23); prntBal = prtp; data += ''; data += ''; if (month != 11) { month++; } else { month = 0; year++; if ((firstMonth != 0) || (i != n-1)) { data += '
'; data += 'Month'; data += 'Principal PaidInterest Paid'; data += ''; data += 'Balance Remaining
'; data += '' + year + ''; data += '
'; data += '' + prntMonth + ''; data += '' + prntPrin; data += ''; data += '' + prntBal + '
'; data += 'Loan + Interest:
' + Total; data += '

3) { no_temp = "," + num.substring(cpl-3,cpl) + no_temp; cpl -= 3; } no_temp = "$" + num.substring(0,cpl) + no_temp } function validNumber() { var oneChar = ""; var decimalFlag = 0; chko = 0; for (var i = 0; i < instr.length; i++) { oneChar = instr.charAt(i); if ((oneChar < "0" || oneChar > "9") && (oneChar != ",") && (oneChar != ".") && (oneChar != "$") && (oneChar != "%")) { numberAlert(); continue; } if ((oneChar == "$") || (oneChar == ",") || (oneChar == "%")) { instr = instr.substring(0,i) + instr.substring((i + 1),instr.length); i--; continue; } if (oneChar == ".") { if ((instr.length == 1) || (decimalFlag == 1)) { numberAlert(); } else { decimalFlag = 1; } continue; } } if (instr == "") { instr = "0"; } } function numberAlert() { var msg = "An invalid number was entered.\nPlease reenter " + errNo + ".\nPress control R (command R for Macintosh),\nand then the Calculate button."; alert(msg); invNo = 1; chko = 1; i = instr.length; }// JScript File