<!--
      function ClearInput(form){
        form.price.value="";
        form.year.value="";
        form.rate.value="";
           form.deposit.value="";
        form.loan.value="";
        this.document.result.month2.value="";
           this.document.result.fortn1.value="";
        return true;
      }
      function help(helponwhat) {
                if (helponwhat == "value")
           alert("Enter the market value of the property (Purchase Price).")
                      else
           if (helponwhat == "year")
           alert("Enter the number of years you want to repay your home loan. ")
                     else
            if (helponwhat == "deposit")
            alert("Enter the down payment amount for your home. ")
 
                      else
            if (helponwhat == "loan")
  
            alert("Enter the total loan amount you require. ")  
                      else
                if (helponwhat == "rate")
           alert("Mortgage Express offers a variety of home loan rate to suit your needs.");
      }
      function CheckForm(form){
        if (form.price.value==null||form.price.value.length==0){
                alert("Please enter the purchase price of your house");
                return false;}
        else
        { if (form.year.value==null||form.year.value.length==0){
                alert("Please enter the length of your mortgage.");
                return false;}
        else
        { if (form.rate.value<2||form.rate.value>20){
                alert("The interest rate should be between 2% and 20%.");
                return false;}
        else
        { if (form.loan.value<1){
                alert("The Loan Amount cannot be less than $1.00.");
                return false;} 
        else
            document.result.price.value = ChkValue(document.result.price.value)
                 document.result.deposit.value = ChkValue(document.result.deposit.value)
                 document.result.loan.value = ChkValue(document.result.loan.value)
                 document.result.year.value = ChkValue(document.result.year.value)
                 
                {       return true;}
        }}}}
      function MakeMoney(numb){
        money='$';
        for (var i=0;i<numb.value.length; i++) {
          j=i+1;
          money+=numb.value.substring(i,j);
          if (numb.value==Math.round(numb.value))
                { pos=numb.value.length-j;}
          else
                { pos=numb.value.length-3-j;}
          tmp=Math.round(pos/3);
          if (pos == tmp*3 && pos != 0) money+=",";
        }
        return money;
      }
      function PVIFA(annual_rate, years, period){
        var monthly_rate=annual_rate/period;
        var factor=0;
        var base_rate=1+monthly_rate;
        var denominator=base_rate;
        for (var i=0;i<(years*period);i++){
                factor+=(1/denominator);
                denominator*=base_rate;}
        return factor;
      }
      function CalcLoan(){
        document.result.loan.value = (ChkValue(document.result.price.value) - ChkValue(document.result.deposit.value));
        
        
      }
                                                                                              
  function ChkValue(CheckValue) {                                                              
                                                                                              
   var TheLength = CheckValue.length;                                                         
   var Nmbrs = "0123456789";                                                                  
                                                                                              
   for (i2 = 0 ; i2 < TheLength ; i2++) {                                                     
                                                                                              
     if (CheckValue.charAt(i2) == ".") {                                                      
        NewValue = CheckValue.substring(0,i2);                                                
        CheckValue = NewValue;                                                                
        i2 = TheLength;                                                                       
                                                                                              
     } else {                                                                                 
                                                                                              
     if (Nmbrs.indexOf(CheckValue.charAt(i2)) == -1) {                                        
        var start = i2 + 1;                                                                   
        NewValue = (CheckValue.substring(0,i2) + CheckValue.substring(start,TheLength));      
        CheckValue = NewValue;                                                                
        i2 = i2 - 1;                                                                          
                                                                                              
     }                                 
     }                                 
   }                                   
                                       
   if (CheckValue == "") {             
      CheckValue = 0;                  
   }                                   
                                       
   return parseFloat(CheckValue);      
 }  
                                                                                              
                                    
                                       
      function Calculate(form){
        if (CheckForm(form)){
            form.loan.value = form.price.value - form.deposit.value;
                interest_rate=(form.rate.value/100);
                monthly_factor=PVIFA(interest_rate, form.year.value, 12);
                fortnightly_factor=PVIFA(interest_rate, form.year.value, 26);
                        var base_amount=form.loan.value;
                this.document.result.month2.value=Math.round(base_amount/monthly_factor);
            this.document.result.fortn1.value=Math.round(base_amount/fortnightly_factor);
                        form.price.value=MakeMoney(form.price);
                        form.deposit.value=MakeMoney(form.deposit);
                        form.loan.value=MakeMoney(form.loan);
                this.document.result.month2.value=MakeMoney(this.document.result.month2);
                this.document.result.fortn1.value=MakeMoney(this.document.result.fortn1);
                
            return true;
        }
      }
      
// -->