Código Javascript
:
Ver original<script language="javascript">
function Totales(form) {
form.elements["total"].value = parseFloat(form.elements["caja1"].value) + parseFloat(form.elements["caja2"].value)
}
</script>
Código HTML:
Ver original<form name="Miformularionombre"> Caja 1
<input onKeyUp="Totales(this.form)" type="text" name="caja1" value="100"> Caja 2
<input onKeyUp="Totales(this.form)" type="text" name="caja2" value="100"> Total:
<input type=text name="total" readonly >