Fecha: 21/01/2003
script funcion calculo de intereses
sencilla funcion javascript que se encarga de obtener total y subtotal sumando la tasa de impuestos.
Código Javascript
<HTML>
<!-- Copiar dentro del tag BODY -->
<BODY>
<script type="text/javascript">
<!--
function cent(amount) {
// returns the amount in the .99 format
return (amount == Math.floor(amount)) ? amount + '.00' : ( (amount*10 == Math.floor(amount*10)) ? amount + '0' : amount);
}
function update(form) {
var subtotal = (form.quantity.value - 0) * (form.unitcost.value - 0);
subtotal = Math.floor(subtotal * 100)/100;
form.subtotal.value = '$' + cent(subtotal);
var tax = subtotal / 100 * (form.rate.value - 0);
tax = Math.floor(tax * 100)/100
form.tax.value = '$' + cent(tax);
total = subtotal + tax;
total = Math.floor(total * 100)/100
form.total.value = '$' + cent(total);
}
//-->
</SCRIPT>
<FORM>
<TABLE>
<TR><TD>Cantidad: </TD><TD><INPUT TYPE="TEXT" NAME="quantity" SIZE="8"></TD></TR>
<TR><TD>Costo unitario: </TD><TD><INPUT TYPE="TEXT" NAME="unitcost" VALUE="19.99"SIZE="8"></TD></TR>
<TR><TD>Tasa de impuesto (%): </TD><TD><INPUT TYPE="TEXT" NAME="rate" VALUE="7.5"SIZE="8"></TD></TR>
<TR><TD>Subtotal: </TD><TD><INPUT TYPE="TEXT" NAME="subtotal"SIZE="8"></TD></TR>
<TR><TD>Impuesto: </TD><TD><INPUT TYPE="TEXT" NAME="tax"SIZE="8"></TD></TR>
<TR><TD>Total: </TD><TD><INPUT TYPE="TEXT" NAME="total"SIZE="8"></TD></TR>
<TR><TD> </TD><TD><INPUT TYPE="BUTTON" onClick="update(this.form)" VALUE="Resultado"></TD></TR>
</TABLE>
</FORM>
</BODY>
</HTML> 
Categoría: 
