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Calculadora Creditos FIMASTER
Calculadora para préstamos
<html>
<head>
<title>Calculadora Creditos</title>
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</head>
<body>
<p align="center"><font face="Verdana"><b>Calculadora para préstamos </b></font></p>
<form name="loandata">
<table height="232">
<tr>
<td colspan="3" height="42">
<div class="result">
<font face="Verdana" style="font-size: 9pt; font-weight: 700">Entra
información sobre el préstamo:</font></div>
</td>
</tr>
<tr>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">1)</font></div>
</td>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">Cantidad del préstamo:</font></div>
</td>
<td height="22"><font face="Verdana" style="font-size: 9pt">
<input type="text" name="principal" size="12" onChange="calculate()"></font></td>
</tr>
<tr>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">2)</font></div>
</td>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">Interés anual:</font></div>
</td>
<td height="22"><font face="Verdana" style="font-size: 9pt">
<input type="text" name="interest" size="12" onChange="calculate()"></font></td>
</tr>
<tr>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">3)</font></div>
</td>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">Duración en años:</font></div>
</td>
<td height="22"><font face="Verdana" style="font-size: 9pt">
<input type="text" name="years" size="12" onChange="calculate()"></font></td>
</tr>
<tr>
<td colspan="3" height="26">
<div class="result">
<font face="Verdana" style="font-size: 9pt">
<input type="button" value="Calcular" onClick="calculate()"> Información
sobre pagos:</font></div>
</td>
</tr>
<tr>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">4)</font></div>
</td>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">Pago por mes:</font></div>
</td>
<td height="22"><font face="Verdana" style="font-size: 9pt">
<input type="text" name="payment" size="12"></font></td>
</tr>
<tr>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">5)</font></div>
</td>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">Coste total:</font></div>
</td>
<td height="22"><font face="Verdana" style="font-size: 9pt">
<input type="text" name="total" size="12"></font></td>
</tr>
<tr>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">6)</font></div>
</td>
<td height="22">
<div class="result">
<font face="Verdana" style="font-size: 9pt">Interés total:</font></div>
</td>
<td height="22"><font face="Verdana" style="font-size: 9pt">
<input type="text" name="totalinterest" size="12"></font></td>
</tr>
</table>
</form>
<script type="text/javascript">
function calculate() {
var principal = document.loandata.principal.value;
var interest = document.loandata.interest.value / 100 / 12;
var payments = document.loandata.years.value * 12;
var x = Math.pow(1 + interest, payments);
var monthly = (principal*x*interest)/(x-1);
if (!isNaN(monthly) &&
(monthly != Number.POSITIVE_INFINITY) &&
(monthly != Number.NEAGTIVE_INFINITY)) {
document.loandata.payment.value=Math.round(monthly);
document.loandata.total.value=Math.round(monthly*payments);
document.loandata.totalinterest.value=Math.round((monthly*payments) - principal);
}
else {
document.loandata.payment.value="";
document.loandata.total.value="";
document.loandata.totalinterest.value="";
}
}
function round(x) {return Math.round(x *100)/100;}
</script>
</body>
</html>
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