" +
" " +
" | Estimated costs to obtain a new mortgage: | " +
" | " +
" " + "" + "$" + strMortCosts + "" + " | " +
"
" +
" " +
" | Current Monthly Payment: | " +
" | " +
" " + "" + "$" + strMonthPay + "" + " | " +
"
" +
" " +
" | Refinance Payment: | " +
" | " +
" " + "" + "$" + strRefiPay + "" + " | " +
"
" +
" " +
" | How much lower the new payment would be than the current one: | " +
" | " +
" " + "" + "$" + strPayDiff + "" + " | " +
"
" +
" " +
" | Months to break even: | " +
" | " +
" " + "" + strBreakMonths + "" + " | " +
"
" +
"
";
var objResults = document.getElementById('objResults');
if( objResults != null ) {
objResults.innerHTML = changeMsg;
}
DrawChart();
}
function checkForm(form)
{
var errorMsg = "";
var i;
var message = new Array();
var inputs = new Array(form.length);
var currentloan, currentpi, currentrate, currentvalue, newterm, newrate, newamount = "";
for (i = 0; i < form.length; i++)
inputs[i] = form.elements[i].name;
for (i = 0; i < form.length; i++) {
if (inputs[i] == "refinance_current_loan")
currentloan = i;
else if (inputs[i] == "refinance_current_rate")
currentrate = i;
else if (inputs[i] == "refinance_current_pi")
currentpi = i;
else if (inputs[i] == "refinance_current_value")
currentvalue = i;
else if (inputs[i] == "refinance_new_term")
newterm = i;
else if (inputs[i] == "refinance_new_rate")
newrate = i;
else if (inputs[i] == "refinance_new_loanamt")
newamount = i;
}
message[0] = "Please enter your current loan balance.\n";
message[1] = "Your current loan balance should be free of letters or special characters.\n";
message[2] = "Your current loan balance should be greater than $0 and less than $1,000,000,000.\n";
message[3] = "Please enter your current principal and interest.\n";
message[4] = "The current principal and interest of your loan should be free of letters and special characters.\n";
message[5] = "The current principal and interest of your loan should be less than $1,000,000,000.\n";
message[6] = "Please enter your current interest rate.\n";
message[7] = "Your current interest rate value should be free of letters and special characters.\n";
message[8] = "Your current interest rate value should be greater than 0% and less than 51%.\n";
message[9] = "Please enter the amount of the new loan.\n";
message[10] = "The new loan amount should be free of letters or special characters.\n";
message[11] = "The new loan amount should be greater than $0 and less than $1,000,000,000.\n";
message[12] = "Please enter your new interest rate.\n";
message[13] = "Your new interest rate value should be free of letters and special characters.\n";
message[14] = "Your new interest rate value should be greater than 0% and less than 51%.";
message[15] = "Please enter the estimated value of your property.\n";
message[16] = "The estimated value of your property should be free of letters or special characters.\n";
message[17] = "The estimated value of your property should be greater than $0 and less\n" + "than $1,000,000,000.\n";
var currentLoanValue = cleanInput(form.elements[currentloan].value);
var currentPiValue = cleanInput(form.elements[currentpi].value);
var currentRateValue = cleanInput(form.elements[currentrate].value);
var currentValue = cleanInput(form.elements[currentvalue].value);
var newRateValue = cleanInput(form.elements[newrate].value);
var newAmountValue = cleanInput(form.elements[newamount].value);
errorMsg +=validateRangedNumberValue(currentLoanValue, message[0], message[1], message[2], 0, 99999999);
errorMsg +=validateRangedNumberValue(currentPiValue, message[3], message[4], message[5], 0, 9999999);
errorMsg +=validateRangedNumberValue(currentRateValue, message[6], message[7], message[8], 1, 50);
errorMsg +=validateRangedNumberValue(currentValue, message[15], message[16], message[17], 0, 9999999);
errorMsg +=validateRangedNumberValue(newRateValue, message[12], message[13], message[14], 1, 50);
errorMsg +=validateRangedNumberValue(newAmountValue, message[9], message[10], message[11], 0, 99999999);
//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 = "";
}
ProxySimpleBarGraph_Clear();
ProxySimpleBarGraph_ShowImage(true);
}
function SimpleBarGraph_Ready()
{
ProxySimpleBarGraph_SetImage('/images/calculator/default_mortgage.jpg');
ProxySimpleBarGraph_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 = 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()
{
ProxySimpleBarGraph_Clear();
ProxySimpleBarGraph_ShowImage(true);
if ( !g_bGraphReady ) {
return;
}
var iMonthPay = parseInt(monthPay);
var iRefiPay = parseInt(refiPay);
var yMax = Math.max(iMonthPay, iRefiPay);
var yInc = getIncrement(yMax);
var yNumDiv = getNumDivs(yMax);
//var iRange = Math.abs(iMonthPay - iRefiPay);
//var iStep = iRange.toNearest(10);
var oVert = new Object();
oVert['padding'] = 30;
oVert['offset'] = 10;
oVert['min'] = 0;
oVert['increment'] = yInc;
oVert['legend'] = '