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Mortgage Calculator Problem

Posted on 2004-04-01
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Medium Priority
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Last Modified: 2013-12-03
My code is below - I thought it was ok, but I'm getting an error.  The error is this:

Line: 12  (I believe it is this - var mi = document.temps.IR.value / 1200;)
Char: 3

Error: 'document.temps.IR' is null or not an object
Code: 0

*****************************************************************
Code:

 <html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
  <title>Mortgage Calculator</title>
  <script LANGUAGE="JavaScript">
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);
  }
</script>
 
</head>
<body bgcolor="#FFFFFF">

<table width="71%"  border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><table width="100%"  border="0" cellspacing="2" cellpadding="2">
      <tr>
        <td colspan="6">Mortgage and Expense Information</td>
        </tr>
      <tr>
        <td colspan="6"><hr width="100%" size=1 noshade></td>
        </tr>
      <tr>
        <td width="15%"><font size="2"
  face="Arial, Verdana" color="003366">Term (Yrs.):</font></td>
        <td width="14%"><font size="2"
  face="Arial, Verdana" color="003366">
          <input name="YR"
  onChange="dosum()" size="6" value="25">
        </font></td>
        <td width="18%"><font size="2"
  face="Arial, Verdana" color="003366">Interest Rate:</font></td>
        <td width="18%"><font size="2"
  face="Arial, Verdana" color="003366">
          <input type="TEXT"
  name="IR" onChange="dosum()" size="6" value="8.0">
        </font></td>
        <td width="18%"><font color="003366" size="2" face="Arial, Verdana">Loan Amount: </font></td>
        <td width="17%"><font size="2"
  face="Arial, Verdana" color="003366">
          <input type="TEXT"
  name="LA" onChange="dosum()" size="7" value="100000">
        </font></td>
      </tr>
      <tr>
        <td><font size="2"
  face="Arial, Verdana" color="003366">Annual Taxes:</font></td>
        <td><font size="2"
  face="Arial, Verdana" color="003366">
          <input name="AT"
  onChange="dosum()" size="6" value="1500">
        </font></td>
        <td><font size="2"
  face="Arial, Verdana" color="003366">Annual Insurance:</font></td>
        <td><font size="2"
  face="Arial, Verdana" color="003366">
          <input name="AI"
  onChange="dosum()" size="6" value="500">
        </font></td>
        <td colspan="2"><font
  size="2" face="Arial, Verdana" color="003366">
          <input name="button"
  type="button" onClick="dosum()" value="Calculate Now!">
        </font></td>
        </tr>
    </table></td>
  </tr>
  <tr>
    <td><table width="100%"  border="0" cellspacing="2" cellpadding="2">
      <tr>
        <td>Resulting Payments</td>
      </tr>
      <tr>
        <td><hr width="100%" size=1 noshade></td>
      </tr>
      <tr>
        <td><table width="100%"  border="0" cellspacing="2" cellpadding="2">
          <tr>
            <td width="56%"><font size="2" face="Arial, Verdana" color="003366">Monthly Principal and Interest</font></td>
            <td width="44%"><font size="2" face="Arial, Verdana" color="003366">
              <input
  name="PI" size="10">
            </font></td>
          </tr>
          <tr>
            <td><font size="2" face="Arial, Verdana" color="003366">Monthly Taxes</font></td>
            <td><font size="2" face="Arial, Verdana" color="003366">
              <input
  type="TEXT" name="MT" size="10">
            </font></td>
          </tr>
          <tr>
            <td><font size="2" face="Arial, Verdana" color="003366">Monthly Insurance</font></td>
            <td><font size="2" face="Arial, Verdana" color="003366">
              <input
  type="TEXT" name="MI" size="10">
            </font></td>
          </tr>
          <tr>
            <td><strong><font size="2"
  face="Arial, Verdana" color="003366">Total Payment</font></strong></td>
            <td><strong><font size="2"
  face="Arial, Verdana" color="003366">
            <input
  type="TEXT" name="MP" size="10">
</font></strong></td>
          </tr>
        </table></td>
      </tr>
      <tr>
        <td><hr width="100%" size=1 noshade></td>
      </tr>
      <tr>
        <td><font size="-2" face="Arial, Verdana" color="003366">&nbsp;This information is accurate but may not apply to your actual mortgage agreement.&nbsp; Consult a professional Realtor or Mortgage Company for a written quote. </font></td>
      </tr>
    </table></td>
  </tr>
</table>
</body>
  </html>
*************************************************************************

Can anybody help?
0
Comment
Question by:velcrobots
[X]
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3 Comments
 
LVL 12

Accepted Solution

by:
venkateshwarr earned 1000 total points
ID: 10737499
Hi velcrobots,

Include the form name before the table as
<form name="temps">
<table>
.
.
.
</table>
</form>

Cheers!
venkat.
0
 
LVL 15

Expert Comment

by:Timbo87
ID: 10737505
Not quite sure what "temps" is. I replaced it with a form and it works.

<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
  <title>Mortgage Calculator</title>
  <script LANGUAGE="JavaScript">
function floor(number)
  {
  return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
  }
function dosum()
  {
  var mi = document.forms[0].IR.value / 1200;
  var base = 1;
  var mbase = 1 + mi;
  for (i=0; i<document.forms[0].YR.value * 12; i++)
  {
  base = base * mbase
  }
  document.forms[0].PI.value = floor(document.forms[0].LA.value * mi / ( 1 - (1/base)))
  document.forms[0].MT.value = floor(document.forms[0].AT.value / 12)
  document.forms[0].MI.value = floor(document.forms[0].AI.value / 12)
  var dasum = document.forms[0].LA.value * mi / ( 1 - (1/base)) +
  document.forms[0].AT.value / 12 +
  document.forms[0].AI.value / 12;
  document.forms[0].MP.value = floor(dasum);
  }
</script>
 
</head>
<body bgcolor="#FFFFFF">
<form>
<table width="71%"  border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><table width="100%"  border="0" cellspacing="2" cellpadding="2">
      <tr>
        <td colspan="6">Mortgage and Expense Information</td>
        </tr>
      <tr>
        <td colspan="6"><hr width="100%" size=1 noshade></td>
        </tr>
      <tr>
        <td width="15%"><font size="2"
  face="Arial, Verdana" color="003366">Term (Yrs.):</font></td>
        <td width="14%"><font size="2"
  face="Arial, Verdana" color="003366">
          <input name="YR"
  onChange="dosum()" size="6" value="25">
        </font></td>
        <td width="18%"><font size="2"
  face="Arial, Verdana" color="003366">Interest Rate:</font></td>
        <td width="18%"><font size="2"
  face="Arial, Verdana" color="003366">
          <input type="TEXT"
  name="IR" onChange="dosum()" size="6" value="8.0">
        </font></td>
        <td width="18%"><font color="003366" size="2" face="Arial, Verdana">Loan Amount: </font></td>
        <td width="17%"><font size="2"
  face="Arial, Verdana" color="003366">
          <input type="TEXT"
  name="LA" onChange="dosum()" size="7" value="100000">
        </font></td>
      </tr>
      <tr>
        <td><font size="2"
  face="Arial, Verdana" color="003366">Annual Taxes:</font></td>
        <td><font size="2"
  face="Arial, Verdana" color="003366">
          <input name="AT"
  onChange="dosum()" size="6" value="1500">
        </font></td>
        <td><font size="2"
  face="Arial, Verdana" color="003366">Annual Insurance:</font></td>
        <td><font size="2"
  face="Arial, Verdana" color="003366">
          <input name="AI"
  onChange="dosum()" size="6" value="500">
        </font></td>
        <td colspan="2"><font
  size="2" face="Arial, Verdana" color="003366">
          <input name="button"
  type="button" onClick="dosum()" value="Calculate Now!">
        </font></td>
        </tr>
    </table></td>
  </tr>
  <tr>
    <td><table width="100%"  border="0" cellspacing="2" cellpadding="2">
      <tr>
        <td>Resulting Payments</td>
      </tr>
      <tr>
        <td><hr width="100%" size=1 noshade></td>
      </tr>
      <tr>
        <td><table width="100%"  border="0" cellspacing="2" cellpadding="2">
          <tr>
            <td width="56%"><font size="2" face="Arial, Verdana" color="003366">Monthly Principal and Interest</font></td>
            <td width="44%"><font size="2" face="Arial, Verdana" color="003366">
              <input
  name="PI" size="10">
            </font></td>
          </tr>
          <tr>
            <td><font size="2" face="Arial, Verdana" color="003366">Monthly Taxes</font></td>
            <td><font size="2" face="Arial, Verdana" color="003366">
              <input
  type="TEXT" name="MT" size="10">
            </font></td>
          </tr>
          <tr>
            <td><font size="2" face="Arial, Verdana" color="003366">Monthly Insurance</font></td>
            <td><font size="2" face="Arial, Verdana" color="003366">
              <input
  type="TEXT" name="MI" size="10">
            </font></td>
          </tr>
          <tr>
            <td><strong><font size="2"
  face="Arial, Verdana" color="003366">Total Payment</font></strong></td>
            <td><strong><font size="2"
  face="Arial, Verdana" color="003366">
            <input
  type="TEXT" name="MP" size="10">
</font></strong></td>
          </tr>
        </table></td>
      </tr>
      <tr>
        <td><hr width="100%" size=1 noshade></td>
      </tr>
      <tr>
        <td><font size="-2" face="Arial, Verdana" color="003366">&nbsp;This information is accurate but may not apply to your actual mortgage agreement.&nbsp; Consult a professional Realtor or Mortgage Company for a written quote. </font></td>
      </tr>
    </table></td>
  </tr>
</table>
</form>
</body>
  </html>
0
 

Author Comment

by:velcrobots
ID: 10737651
Thank you both for the quick response, it works just perfectly now.  I had to give the points to vankat, he was just a couple minutes earlier!!!

Thanks again!
0

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