" +
" " +
" | Estimated costs of renting: | " +
" ![](\"/images/spacer.gif\") " + "$" + strEstimatedCostsOfRenting + " | " +
"
" +
" " +
" | Estimated gross costs of buying: (includes $" + strClosingCosts + " in closing costs) | " +
" " + "$" + strEstimatedGrossCostsOfBuying + " | " +
"
" +
" " +
" | Estimated amount of tax related savings: | " +
" " + "$" + strEstimatedTaxRelatedSavings + " | " +
"
" +
" " +
" | Estimated amount in increased equity: | " +
" " + "$" + strEstimatedIncreasedEquity + " | " +
"
" +
" " +
" | Estimated net costs of buying: | " +
" " + "$" + strEstimatedNetCostsOfBuying + " | " +
"
" +
" " +
" | Estimated total savings: (not including investment related savings) | " +
" " + "$" + strEstimatedTotalSavings + " | " +
"
" +
" " +
" | Estimated investment related savings: | " +
" " + "$" + strEstimatedInvestmentRelatedSavings + " | " +
"
" +
"
";
var objResults = document.getElementById('objResults');
if( objResults != null ) {
objResults.innerHTML = g_strChartLegend + changeMsg;
}
DrawChart();
}
function checkForm(form)
{
var errorMsg = "";
var i;
var message = new Array();
var inputs = new Array(form.length);
var rent, annualincrease, interestrate, loanamount, purchaseprice, propertytax,
yearsinhome = "";
for (i = 0; i < form.length; i++) {
inputs[i] = form.elements[i].name;
}
for (i = 0; i < form.length; i++) {
if (inputs[i] == "rent_buy_monthly_rent")
rent = i;
else if (inputs[i] == "rent_buy_expected_increase")
annualincrease = i;
else if (inputs[i] == "rent_buy_interest_rate")
interestrate = i;
else if (inputs[i] == "rent_buy_loan_term")
loanterm = i;
else if (inputs[i] == "rent_buy_loan_amount")
loanamount = i;
else if (inputs[i] == "rent_buy_purchase_price")
purchaseprice = i;
else if (inputs[i] == "rent_buy_property_taxes")
propertytax = i;
else if (inputs[i] == "rent_buy_years_home")
yearsinhome = i;
}
message[0] = "Please enter your monthly rent.\n";
message[1] = "Your monthly rent should be free of special characters or letters.\n";
message[2] = "Your monthly rent should be greater than $0 and less than $1,000,000,000.\n";
message[3] = "Please enter your expected annual rent increase.\n";
message[4] = "The value for expected annual rent increase should be free of special characters or\n" +
"letters.\n";
message[5] = "Your expected annual rent increase should be between 0% and 10%.\n";
message[6] = "Please enter an interest rate.\n";
message[7] = "Your interest rate value should be free of special characters or letters.\n";
message[8] = "Your interest rate value should be greater than 0% and less than 51%.\n";
message[9] = "Please enter a value for loan amount.\n";
message[10] = "Your loan amount should be free of special characters or letters.\n";
message[11] = "Your loan amount should be greater than $20000.\n";
message[12] = "Please enter a value for purchase price.\n";
message[13] = "Your purchase price should be free of special characters or letters.\n";
message[14] = "Your purchase price should be greater than or equal to \n" +
"your loan amount and less than $1,000,000,000.\n";
message[15] = "Your purchase price should be greater than or equal to your loan amount.\n";
message[16] = "Your proposed property taxes should be free of letters and special characters.\n";
message[17] = "The value of your proposed property taxes must be a minimum of $0 and\n" +
"less than or equal to $1,000,000,000.\n";
message[18] = "Please enter the number of years you plan to be in your home.\n";
message[19] = "The number of years you plan to be in this home should be\n" +
"free of letters or special characters.\n";
message[20] = "The number of years you plan to be in this home should be greater\n" +
"than 0 and less than or equal to the term of the loan.\n";
var rentValue = cleanInput(form.elements[rent].value);
var annualIncreaseValue = cleanInput(form.elements[annualincrease].value);
var interestRateValue = cleanInput(form.elements[interestrate].value);
var loanAmountValue = cleanInput(form.elements[loanamount].value);
var purchasePriceValue = cleanInput(form.elements[purchaseprice].value);
var propertyTaxValue = cleanInput(form.elements[propertytax].value);
var yearsInHomeValue = cleanInput(form.elements[yearsinhome].value);
var loanTermValue = form.elements[loanterm].options[form.elements[loanterm].selectedIndex].value;
errorMsg += validateRangedNumberValue(rentValue, message[0], message[1], message[2], 0, 1000000);
errorMsg += validateRangedNumberValue(annualIncreaseValue, message[3], message[4], message[5], 0, 10);
errorMsg += validateRangedNumberValue(interestRateValue, message[6], message[7], message[8], 1, 50);
errorMsg += validateRangedNumberValue(loanAmountValue, message[9], message[10], message[11], 20000, 1000000000);
errorMsg += validateRangedNumberValue(purchasePriceValue, message[12], message[13], message[14], 20000, 1000000000);
errorMsg += validateEmptyOrRangedNumberValue(propertyTaxValue, message[16], message[17], 0, 1000000000);
errorMsg += validateRangedNumberValue(yearsInHomeValue, message[18], message[19], message[20], 1, loanTermValue);
var lamount = new Number(loanAmountValue);
var pprice = new Number(purchasePriceValue);
var yrsinhome = new Number(yearsInHomeValue);
if ((isBlank(loanAmountValue) == 0)&&
(isNaN(loanAmountValue) == false)&&
(lamount > 0)&&
(lamount < 1000000000)&&
(isBlank(purchasePriceValue) == 0)&&
(isNaN(purchasePriceValue) == false)&&
(pprice >= 20000)&&
(pprice <= 1000000000)&&
(lamount > pprice))
errorMsg += message[15];
//No need to return anything here
if (errorMsg.length == 0) {
//If there's no error message, calculate
clearResults();
calculate();
showResults();
return true;
} else {
//If there's an error message, just show it
alert("Before continuing, the following fields require attention:\n\n" + errorMsg);
}
return false;
}
function clearResults()
{
var objResults = document.getElementById('objResults');
if( objResults != null ) {
objResults.innerHTML = "";
}
ProxySimpleLineGraph_Clear();
ProxySimpleLineGraph_ShowImage(true);
}
/////////////////
//
function SimpleLineGraph_Ready()
{
ProxySimpleLineGraph_SetImage('/images/calculator/default_rentvsbuy.jpg');
ProxySimpleLineGraph_ShowImage(true);
g_bGraphReady = true;
}
function getMultiplier(num)
{
var len = num.toString().length;
if (len > 2) {
return Math.pow(10, len-2);
}
return 10;
}
function getTopNum(num)
{
// if (num <= 100) num = 1000;
var mult = getMultiplier(num) * 10;
var topNum = num / mult;
var dec = topNum - parseInt(topNum);
if ((dec < 0.5) && (dec > 0)) dec = topNum += 0.5 - dec;
else topNum = Math.ceil(topNum);
topNum *= mult;
return topNum;
}
function getNumDivs(num)
{
var yTop = getTopNum(num);
var yMult = getMultiplier(yTop)
var iTmp = yTop / yMult;
var yNumDiv = iTmp;
var iCnt = 0;
while (iTmp > 9) {
iTmp = Math.ceil(iTmp / 5);
iCnt++;
}
var yInc = yMult * Math.pow(5, iCnt);
yNumDiv = iTmp;
while (yNumDiv < 4) {
yNumDiv *= 2;
yInc /= 2;
}
yNumDiv++;
return yNumDiv;
}
function getIncrement(num)
{
var yTop = getTopNum(num);
var yMult = getMultiplier(yTop)
var iTmp = yTop / yMult;
var yNumDiv = iTmp;
var iCnt = 0;
while (iTmp > 9) {
iTmp = Math.ceil(iTmp / 5);
iCnt++;
}
var yInc = yMult * Math.pow(5, iCnt);
yNumDiv = iTmp;
while (yNumDiv < 4) {
yNumDiv *= 2;
yInc /= 2;
}
return yInc;
}
function DrawChart()
{
ProxySimpleLineGraph_Clear();
ProxySimpleLineGraph_ShowImage(true);
if ( !g_bGraphReady ) {
return;
}
fm = document.forms.rentvsbuy;
var yMax = Math.max(getMaxFromObject(g_oData1), getMaxFromObject(g_oData2));
var yInc = getIncrement(yMax);
var yNumDiv = getNumDivs(yMax);
// alert("yMax:" + yMax + " yInc:" + yInc + " yNumDiv:" + yNumDiv);
var xInc = 1
var xNumDiv = plannedYearsToOccupy;
if (xNumDiv > 15) {
xInc *= 2;
xNumDiv /= 2;
}
xNumDiv += 1;
var oVert = new Object();
oVert['padding'] = 30;
oVert['offset'] = 10;
oVert['min'] = 0; //iPaymentMin;
oVert['increment'] = yInc; // iPaymentIncrement;
oVert['legend'] = '