function floor(number)
{
  return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function dosum()
{
  var mi = document.temps.IR.value / 1200;
  var base = 1;
  var mbase = 1 + mi;
  for (i=0; i<document.temps.YR.value * 12; i++)
  {
    base = base * mbase
  }
  document.temps.PI.value = floor(document.temps.LA.value * mi / ( 1 - (1/base)))
  document.temps.MT.value = floor(document.temps.AT.value / 12)
  document.temps.MI.value = floor(document.temps.AI.value / 12)
  var dasum = document.temps.LA.value * mi / ( 1 - (1/base)) +
        document.temps.AT.value / 12 +
        document.temps.AI.value / 12;
  document.temps.MP.value = floor(dasum);
}

window.onerror=null
bState = true
oReq = new Collection("AMOUNT","RATE","","","","")
oVal = new Collection("AMOUNT","RATE","","","","")
oTst = new Collection("N","N","","","","")

function controller(oForm, oBtn) {
   while (bState) {
      if (!Required(oForm))
         break
      if (!Validate(oForm))
         break
      if (!SetValue(oForm))
         break
      if (bState) {
          bState = false
      }
   }
   bState = true
}
function Required(oView) {
   for (i in oView) {
      for (j in oReq) {
        if (i==oReq[j]) {
           if (isMissing(oView[i])) {
               return(false)
           }
        }
     }
  }
  return(true)
}
function Validate(oView) {
   for (i in oView) {
      for (j in oVal) {
        if (i==oVal[j] && oTst[j]=="N") {
           if (isTest(oView[i], oTst[j])) {
               return(false)
           }
        }
     }
  }
  return(true)
}
function SetValue(oView) {
   Mortgage = new Loan(oView.AMOUNT.value, oView.RATE.value, get_selection(oView.YEARS), 0, 0, get_selection(oView.FREQUENCY), 0 )
   Mortgage.calcPeriods()
   Mortgage.calcPayment()
   Mortgage.calcInterest()
   oView.PAYMENT.value = calcRound(Mortgage.Payment)
   oView.INTEREST.value = calcRound(Mortgage.Interest)
   setCookie("_Prin", Mortgage.Amount)
   setCookie("_Int", Mortgage.Rate)
   setCookie("_Year", Mortgage.Term)
   setCookie("_Tot", Mortgage.Interest)
   return(true)
}

function isMissing(oCtrl) {
   if (oCtrl.value == "") {
      alert("You have left a required value blank. Please type a number")
      oCtrl.focus()
      oCtrl.select()
      return(true)
      }
   else
      {
      return(false)
   }
}
function isTest(oCtrl, oTest) {
   if (oTest=="N" && !isNumber(oCtrl.value) ) {
      alert(oCtrl.value+" contains an invalid character. Please type a number")
      oCtrl.focus()
      oCtrl.select()
      return(true)
      }
      else
      {
      return(false)
   }
}
function isNumber(input) {
   for (var i=0;i<input.length;i++) {
       var oneChar = input.substring(i, i+1)
       if (oneChar < "0" || oneChar > "9") {
          if (oneChar != "." ) {
             return(false)
          }
       }
   }
   return(true)
}

function Collection(item1, item2, item3, item4, item5, item6) {
   this.item1 = item1
   this.item2 = item2
   this.item3 = item3
   this.item4 = item4
   this.item5 = item5
   this.item6 = item6
}
function Loan(Amount, Rate, Term, Payment, Interest, Frequency, Periods ) {
   this.Amount = Amount
   this.Rate = Rate
   this.Term = Term
   this.Payment = Payment
   this.Interest = Interest
   this.Frequency = Frequency
   this.Periods = Periods
   this.calcPeriods = calcPeriods
   this.calcPayment = calcPayment
   this.calcInterest = calcInterest
}
function calcPayment() {
   this.Payment = (this.Amount*((this.Rate/(this.Periods*100))/(1-(Math.pow(1+(this.Rate/(this.Periods*100)),((this.Term*this.Periods)*-1))))))
}
function calcInterest() {
   this.Interest = ((this.Payment*(this.Term*this.Periods))-this.Amount)
}
function calcPeriods() {
   if (this.Frequency=="Monthly") { this.Periods=12 } else { this.Periods=26 }
}
function calcRound(num) {
   result=" "+Math.floor(num)+"."
   n = result.length
   if (num>1000 && num<999999) {
     result=" "+result.substring(1,n-4)+","+result.substring(n-4,n)
   }
   if (num>1000000) {
     result =" "+result.substring(1,n-7)+","+result.substring(n-7,n-4)+","+result.substring(n-4,n)
   }
   var cents=100*(num-Math.floor(num))+0.5
   result += Math.floor(cents/10)
   result += Math.floor(cents%10)
   return(result)
}

function select_item(name, value) {
   this.name = name
   this.value = value
}
function get_selection(select_object) {
   contents = new select_item()
   for(var i=0;i<select_object.options.length;i++)
      if(select_object.options[i].selected == true) {
        contents.name = select_object.options[i].text
        contents.value = select_object.options[i].value
      }
   return(contents.name)
}
function setCookie (name, value ) {
  document.cookie = name + "=" + escape (value) + "; path=/";
}

function setfocus() {
   document.MORTGAGE.AMOUNT.focus()
   document.MORTGAGE.AMOUNT.select()
}