function getMortgage(a,n,p) { if (document.getElementById('TermYear').checked) { n = n * 12; } var i=0; var sATline=""; var oMortgageTable=document.getElementById("mortgagetable"); oMortgageTable.style.visibility="visible"; /* Calculate amortization and write table to text area **/ var payment = getPayment(a,n,p); oMortgageTable.value = "Your monthly payment for a " + n + " month loan at " + p + "% would be " + (Math.round(payment*100)/100); } function getPayment(a,n,p) { /* Calculates the monthly payment from annual percentage rate, term of loan in months and loan amount. */ var acc=0; var base = 1 + p/1200; for (i=1;i<=n;i++) { acc += Math.pow(base,-i); } return a/acc; } function CheckYears() { document.getElementById('TermMonth').checked = ""; } function CheckMonths() { document.getElementById('TermYear').checked = ""; } //functions have been created which are called from the , each refer to the form, textbox and the value contained as well as calling Math methods for each. function CalcChSign(input) { if(input.value.substring(0, 1) == "-") input.value = input.value.substring(1, input.value.length) else input.value = "-" + input.value } function DeleteChar(input) { input.value = input.value.substring(0,input.value.length - 1) } function Reset(input) { input.value = "" } function Display1(input) { input.value += "1" } function Display2(input) { input.value += "2" } function Display3(input) { input.value += "3" } function Display4(input) { input.value += "4" } function Display5(input) { input.value += "5" } function Display6(input) { input.value += "6" } function Display7(input) { input.value += "7" } function Display8(input) { input.value += "8" } function Display9(input) { input.value += "9" } function Display0(input) { input.value += "0" } function DisplayPt(input) { input.value += "." } function DisplayDiv(input) { input.value += "/" } function DisplayMult(input) { input.value += "*" } function DisplayPlus(input) { input.value += "+" } function DisplayMinus(input) { input.value += "-" } function CalcResult(form) { form.input.value = eval(form.input.value); }