help with java calculator

W

wxdqz

New Member
I tried to post a message earlier, but I think that the html open and html close tags blocked the message. I opened a file from <!-- m --><a class="postlink" href="http://javascript.internet.com/calculators/amortization.html">http://javascript.internet.com/calculat ... ation.html</a><!-- m --> that is freeware and i tried to open on my own browser. I can enter the numbers for the calculator, but when I click on the Calculate button, it gives me a blank "the error message" explorer screen. With the exception of the open and close html tags, the code is here, or you can see it at <!-- m --><a class="postlink" href="http://javascript.internet.com/calculators/amortization.html">http://javascript.internet.com/calculat ... ation.html</a><!-- m -->. Can anyone tell me what is wrong?



<HEAD>

<SCRIPT LANGUAGE="JavaScript">
<!-- Original: Brian Cordeau (<!-- e --><a href="mailto:[email protected]">[email protected]</a><!-- e -->) -->
<!-- Web Site: <!-- m --><a class="postlink" href="http://www.shsu.edu/~stdbsc13">http://www.shsu.edu/~stdbsc13</a><!-- m --> -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! <!-- m --><a class="postlink" href="http://javascript.internet.com">http://javascript.internet.com</a><!-- m --> -->

<!-- Begin
function Loan() {
var housePrice;
var IR;
var dpayment;
var years;
var monthPay;
var month;
switch(document.calcform.startm.value) {
case "january":
document.calcform.startm.value="0";
parseInt(document.calcform.startm.value)
break;
case "february":
document.calcform.startm.value="1";
parseInt(document.calcform.startm.value)
break;
case "march":
document.calcform.startm.value="2";
parseInt(document.calcform.startm.value);
break;
case "april":
document.calcform.startm.value="3";
parseInt(document.calcform.startm.value);
break;
case "may":
document.calcform.startm.value="4";
parseInt(document.calcform.startm.value);
break;
case "june":
document.calcform.startm.value="5";
parseInt(document.calcform.startm.value);
break;
case "july":
document.calcform.startm.value="6";
parseInt(document.calcform.startm.value);
break;
case "august":
document.calcform.startm.value="7";
parseInt(document.calcform.startm.value);
break;
case "september":
document.calcform.startm.value="8";
parseInt(document.calcform.startm.value);
break;
case "october":
document.calcform.startm.value="9";
parseInt(document.calcform.startm.value);
break;
case "november":
document.calcform.startm.value="10";
parseInt(document.calcform.startm.value);
break;
case "december":
document.calcform.startm.value="11";
parseInt(document.calcform.startm.value);
break;
default:
document.calcform.startm.value="0";
parseInt(document.calcform.startm.value);
break;
}
housePrice = parseFloat(document.calcform.price.value);
dpayment = parseFloat(document.calcform.dpayment.value);
IR = parseFloat(document.calcform.interest.value);
years = parseFloat(document.calcform.time.value);
housePrice = housePrice - dpayment;
month = years * 12;
interestRate = IR / 12;
negmonth =- 1 * month;
var bottom = 1 - (Math.pow(interestRate+1,negmonth));
var top = interestRate;
var mid = top / bottom;
var dec;
document.calcform.monthPay.value = (housePrice * mid);
monthPay = document.calcform.monthPay.value;
document.calcform.monthPay.value = eval(monthPay);
housePrice = housePrice - document.calcform.monthPay.value;
document.calcform.month.value = month;
}
function convert() {
var startmonth = new String();
startmonth = document.calcform.startm.value;
document.calcform.startm.value = startmonth.toLowerCase();
}
function changenum() {
document.calcform.startyear.value=parseInt(document.calcform.startyear.value);
}
var d = new Date;
function getFieldValue (strFieldName) {
var strFieldValue;
var objRegExp = new RegExp(strFieldName + "=([^&]+)","gi");
if (objRegExp.test(location.search))
strFieldValue = unescape(RegExp.$1);
else strFieldValue="";
return strFieldValue;
}
function Currency(money1) {
var money = new String(money1);
var decimal = money.indexOf(".",[0]);
var money = money.substring(0,decimal+3);
var money1 = parseFloat(money);
return money;
}
var startmonth;
startmonth = getFieldValue("startm");
var monthofpayment = new String;
month = getFieldValue("month");
monthPay = getFieldValue("monthPay");
Houseprice = getFieldValue("price");
Ir = getFieldValue("interest");
Ir = Ir/12;
year = getFieldValue("startyear")
function check() {
var dPayment = document.calcform.dpayment.value;
var price = document.calcform.price.value;
if(price.indexOf(",") >= 0) {
alert("Please do not put commas in the Price number")
}
}
function check1() {
var dPayment = document.calcform.dpayment.value;
if(dPayment.indexOf(",") >= 0) {
alert("Please do not put commas in the Down Payment number");
}
}
// End -->
</script>

</HEAD>

<BODY>

<form method="get" name=calcform action="amortization.html">
<table border=0>
<tr>
<td valign="top">
Anticipated Amount of House
<br>
</td>
<td valign="top">
$
<input name=price onblur="check()" size=10>
</td>
</tr>
<tr>
<td>
Amount of Down Payment
</td>
<td>
$
<input name=dpayment onblur="check1()" size=10>
<br>
</td>
</tr>
<tr>
<td>
Anticipated Interest Rate(.00 format)
<br>
</td>
<td>
<input name=interest size=10>
<br>
</td>
<tr>
<td>
Anticipated length of loan, in years.
<br>
</td>
<td>
<input name="time" size=10>
<br>
</tr>
<tr>
<td>
Start Date of Loan (month and year)
</td>
<td>
<input name=startm onblur="convert()" size=10>
<input name=startyear onblur="changenum()" size=10>
</td>
</td>
</tr>
<input name=month type=hidden>
<input name=monthPay type=hidden>
<tr>
<td>
<input type=submit value=http://www.webdeveloper.com/forum/archive/index.php/"Calculate Mortgage" onmouseover="check()" onclick="Loan()">
</td>
</tr>
</table>
</form>
<table border=0>
<tr>
<td>
House Price
</td>
<td>
$
<script language="javascript">
<!--
document.write(getFieldValue("price"));
//-->
</script>
</td>
</tr>
<tr>
<td>
Down Payment
</td>
<td>
$
<script language="javascript">
<!--
document.write((getFieldValue("dpayment")));
//-->
</script>
</td>
</tr>
<tr>
<td>
Monthly Payment
</td>
<td>
$
<script language="javascript">
<!--
var payment = getFieldValue("monthPay");
payment=Currency(payment);
document.write(payment);
//-->
</script>
</td>
</tr>
<tr>
<td>
# of years
</td>
<td>
<script language="javascript">
<!--
document.write(month/12);
-->
</script>
</td>
</tr>
</table>
<table border="1" align="left">
<tr>
<th width="125">
Month/Year
</th>
<th width="125">
Interest
</th>
<th width="125">
Principal
</th>
</tr>
<script language="JavaScript">
<!--
var halfmonth;
halfmonth = month / 2;
for(y = 0; y <= month; y++) {
var interest = Houseprice * Ir;
var principal = monthPay - interest;
Houseprice = Houseprice - principal;
interest = Currency(interest);
principal = Currency(principal);
if(startmonth > 11) {
startmonth = 0;
year++;
}
switch(startmonth.toString()) {
case "0":monthofpayment="January";
break;
case "1":monthofpayment="February";
break;
case "2":monthofpayment="March";
break;
case "3":monthofpayment="April";
break;
case "4":monthofpayment="May";
break;
case "5":monthofpayment="June";
break;
case "6":monthofpayment="July";
break;
case "7":monthofpayment="August";
break;
case "8":monthofpayment="September";
break;
case "9":monthofpayment="October";
break;
case "10":monthofpayment="November";
break;
case "11":monthofpayment="December";
}
document.write("<tr><td width='125'>")
document.write(monthofpayment+" "+year+"</td>"+"<td width='125'>"+"$"+interest+"</td><td width='125'>"+"$"+principal);
document.write("</td></tr>");
startmonth++;
}
//-->
</script>
</table>

<p><center>
<font face="arial, helvetica" size"-2">Free JavaScripts provided<br>
by <a href=http://www.webdeveloper.com/forum/archive/index.php/"http://javascriptsource.com">The JavaScript Source</a></font>
</center><p>

<!-- Script Size: 7.76 KB -->
 
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