function stripNum(num) {
var iPercent
var iDollar
var iSpace
var iComma
var numLength = num.length
//lalalla Line #114
if(numLength > 0) {
num=num.toString();
iPercent = num.indexOf("%");
if(iPercent >= 0) {
num=num.substring(0,iPercent) + "" + num.substring(iPercent + 1,numLength);
numLength=num.length;
}
iDollar = num.indexOf("$");
if(iDollar >= 0) {
num=num.substring(0,iDollar) + "" + num.substring(iDollar + 1,numLength);
numLength=num.length;
}
iSpace = num.indexOf(" ");
if(iSpace >= 0) {
num=num.substring(0,iSpace) + "" + num.substring(iSpace + 1,numLength);
numLength=num.length;
}
iComma = num.indexOf(",");
if(iComma >= 0) {
while(iComma >=1) {
num=num.substring(0,iComma) + "" + num.substring(iComma + 1,numLength);
numLength=num.length;
iComma = num.indexOf(",");
}
}
num = eval(num);
} else {
num = 0;
}
return num;
}
function formatNumber(num) {
var isNeg=0;
if(num < 0) {
num=num*-1;
isNeg=1;
}
onum=Math.round(num*100)/100;
integer=Math.floor(onum);
if (Math.ceil(onum) == integer) {
decimal="00";
} else{
decimal=Math.round((onum-integer)*100)
}
decimal=decimal.toString();
if (decimal.length<2) decimal="0"+decimal;
integer=integer.toString();
var tmpnum="";
var tmpinteger="";
var y=0;
for (x=integer.length;x>0;x--) {
tmpnum=tmpnum+integer.charAt(x-1);
y=y+1;
if (y==3 & x>1) {
tmpnum=tmpnum+",";
y=0;
}
}
for (x=tmpnum.length;x>0;x--) {
tmpinteger=tmpinteger+tmpnum.charAt(x-1);
}
finNum=tmpinteger+"."+decimal;
if(isNeg == 1) {
finNum = "-" + finNum;
}
return finNum;
}
function computeForm(form) {
if(document.calcForm.monthlyRent.value == 0 || document.calcForm.monthlyRent.value == "") {
alert("Please enter your monthly rent payment.");
document.calcForm.monthlyRent.focus();
} else
if(document.calcForm.intRate.value == 0 || document.calcForm.intRate.value == "") {
alert("Please enter the expected mortgage interest rate.");
document.calcForm.intRate.focus();
} else
if(document.calcForm.numYears.value == 0 || document.calcForm.numYears.value == "") {
alert("Please enter the number of years you will finance the home for.");
document.calcForm.numYears.focus();
} else
{
var VmonthlyRent = stripNum(document.calcForm.monthlyRent.value);
var VintRate = stripNum(document.calcForm.intRate.value);
var VnumYears = stripNum(document.calcForm.numYears.value);
var Vtaxes = stripNum(document.calcForm.taxes.value);
var Vinsurance = stripNum(document.calcForm.insurance.value);
var VmonthlyTaxes = Vtaxes / 12;
var VmonthlyIns = Vinsurance / 12;
var Vreduction = eval(VmonthlyTaxes) + eval(VmonthlyIns);
VmonthlyRent = eval(VmonthlyRent) - eval(Vreduction);
var i = VintRate;
if (i >= 1.0) {
i = i / 100.0;
}
i /= 12;
var noMonths = VnumYears * 12;
//ZERO DOWN
var pow_0 = 1;
for (var j_0 = 0; j_0 < noMonths; j_0++)
pow_0 = pow_0 * (1 + i);
var Rprincipal_0 = ((pow_0 - 1) * VmonthlyRent) / (pow_0 * i);
document.calcForm.mortgageSize_0.value = "$" + formatNumber(Rprincipal_0);
var VdownPayment_0 = 0;
document.calcForm.downPayment_0.value = "$" + formatNumber(VdownPayment_0);
var VhomePrice_0 = eval(Rprincipal_0) + eval(VdownPayment_0);
document.calcForm.homePrice_0.value = "$" + formatNumber(VhomePrice_0);
//5% DOWN
var pow_5 = 1;
for (var j_5 = 0; j_5 < noMonths; j_5++)
pow_5 = pow_5 * (1 + i);
var Rprincipal_5 = ((pow_5 - 1) * VmonthlyRent) / (pow_5 * i);
document.calcForm.mortgageSize_5.value = "$" + formatNumber(Rprincipal_5);
var VdownPayment_5 = eval(Rprincipal_5 / .95) - eval(Rprincipal_5);
document.calcForm.downPayment_5.value = "$" + formatNumber(VdownPayment_5);
var VhomePrice_5 = eval(Rprincipal_5) + eval(VdownPayment_5);
document.calcForm.homePrice_5.value = "$" + formatNumber(VhomePrice_5);
//10% DOWN
var pow_10 = 1;
for (var j_10 = 0; j_10 < noMonths; j_10++)
pow_10 = pow_10 * (1 + i);
var Rprincipal_10 = ((pow_10 - 1) * VmonthlyRent) / (pow_10 * i);
document.calcForm.mortgageSize_10.value = "$" + formatNumber(Rprincipal_10);
var VdownPayment_10 = eval(Rprincipal_10 / .90) - eval(Rprincipal_10);
document.calcForm.downPayment_10.value = "$" + formatNumber(VdownPayment_10);
var VhomePrice_10 = eval(Rprincipal_10) + eval(VdownPayment_10);
document.calcForm.homePrice_10.value = "$" + formatNumber(VhomePrice_10);
}
}