// compressed for performance - uncompressed code and notice available at URI http://www.rbvrealestate.com/resources/js/calc_interest_uncompressed.js
function stripNum(num) { var iPercent
var iDollar
var iSpace
var iComma
var numLength = num.length
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 formatNumberDec(num, places, comma) { var isNeg=0; if(num < 0) { num=num*-1; isNeg=1;}
var myDecFact = 1; var myPlaces = 0; var myZeros = ""; while(myPlaces < places) { myDecFact = myDecFact * 10; myPlaces = eval(myPlaces) + eval(1); myZeros = myZeros + "0";}
onum=Math.round(num*myDecFact)/myDecFact; integer=Math.floor(onum); if (Math.ceil(onum) == integer) { decimal=myZeros;} else{ decimal=Math.round((onum-integer)* myDecFact)
}
decimal=decimal.toString(); if (decimal.length<places) { fillZeroes = places - decimal.length; for (z=0;z<fillZeroes;z++) { decimal="0"+decimal;}
}
if(places > 0) { decimal = "." + decimal;}
if(comma == 1) { 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;} else { finNum=integer+""+decimal;}
if(isNeg == 1) { finNum = "-" + finNum;}
return finNum;}
function computeForm(form) { if (form.principal.value == null || form.principal.value.length == 0) { alert("Please enter the loan's principal amount."); form.principal.focus();} else
if (form.interest.value == null || form.interest.value.length == 0) { alert("Please enter the loan's annual interest rate."); form.interest.focus();} else { var Vprincipal = stripNum(form.principal.value); var i = stripNum(form.interest.value); if (i >= 1.0) { i = i / 100.0;}
i /= 12; var Vpayment = Vprincipal * i; form.payment.value = "$" + formatNumberDec(Vpayment,2,1);}
}
{
var helpprincipal = '<h4>Principal</h4><p>Enter the amount you plan to borrow.</p>'
var helpinterest = '<h4>Interest Rate</h4><p>Enter the mortgage\'s interest rate. Do not type a percentage sign (%), simply enter the number.</p>'
}