Need some help!

Discussion in 'JavaScript' started by Luke Watson, Sep 12, 2010.

0
  1. #1
    Hello i'm currently trying to develop a loan calculator which lets the user type in a loan amount, loan repyament per month and an interest rate. When the user clicks on the button i want it to display the term of the loan in years and months and the total interest to be paid.

    
<html>
  <head>
    <title>Calculate Loan</title>
    <style type="text/css">
      body {
             background-color: #000000;
             color: #FFFFFF;
             font-size: 30;
             text-align: center;
           }
    </style>
    <script type="text/javascript">
    function calculate()
      {
        term = 0;
        totalInterest = 0;
        var amount, repayment, rate, monthInterest, term, totalInterest = parseFloat(document.frmLoan.txtLoanAmount.value) * parseFloat(document.frmrate.txtMonthlyRepayment.value), outstring; 
        outstring = "$" + document.frmrate.txtRate.value + " payrate and " + document.frmrate.txtHrs.value + " hour(s) ";
        outstring = outstring + " means you earned $" + sum;
        document.getElementById('div1').innerHTML = outstring;
      }

    function clean()
       {
         //alert("in clean");
         document.frmLoan.txtLoanAmount.value = "";
         document.frmLoan.txtMonthlyRepayment.value = "";
                 document.frmLoan.txtInterestRate.value = "";
         document.getElementById('div1').innerHTML = "";
         document.frmLoan.txtLoanAmount.focus();
         document.frmLoan.txtMonthlyRepayment.focus();
         document.frmLoan.txtLoanAmount.focus();
                 document.frmLoan.txtLoanAmount.focus();
       }
    </script>
    </head>
    <body onload="window.document.frmLoan.txtLoanAmount.focus()">

    <h1>Calculate Loan</h1>
  <form name="frmLoan">
  Enter loan amount : <input type="text" name="txtLoanAmount">
    <br /><br />
  Enter loan repayment amount per month : <input type="text" name="txtMonthlyRepayment">
    <br /><br />
  Enter interest rate : <input type="text" name="txtInterestRate">

    <br /><br />
  
  </form>
   <br /> <br />
   <input type="button" name="cmdcalculate" value="Calculate term of loan and total interest" onclick="calculate()" />
   &nbsp;&nbsp;&nbsp;
   <input type="button" name="cmdClear" value="Reset" onClick="clean()">
   <br /><br /><br />
    <div id="div1"></div>
    </body>
   </html>
    Code (markup):
    That is my code so far i'm not sure what i'm doing wrong but if anyone could help me that would be great. Cheers.:)
     
    Luke Watson, Sep 12, 2010 IP
  2. HungryMinds

    HungryMinds Active Member

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    #2
    Hi!

    Too Many Values Are Missing...

    frmrate Is Missing
    document.frmrate.txtMonthlyRepayment.value

    txtRate Field Is Missing
    document.frmrate.txtRate.value

    txtHrs Field Is Missing
    document.frmrate.txtHrs.value

    And Where Are U Using "totalInterest" In "outstring"?

    totalInterest = parseFloat(document.frmLoan.txtLoanAmount.value) * parseFloat(document.frmrate.txtMonthlyRepayment.value);

    outstring = "$" + document.frmrate.txtRate.value + " payrate and " + document.frmrate.txtHrs.value + " hour(s) ";
    outstring = outstring + " means you earned $" + sum;

    So Complete Your Code Then RUN.
     
    HungryMinds, Sep 12, 2010 IP