hola amigos tengo una duda les cuento, como se puede saber el nombre de un campo a traves del evento on focus lo quiero hacer es lo siguiente:
tengo dos input y cuatro y 11 button cada button reacciona ala evento onclic pasandole el valor al input mi duda es como pasa el nombre del campo donde esta el foco al evento on clik se entinede este es el codigo gracias
<html>
<head>
<title>Documento sin título</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<script language="LiveScript">
<!--
function agrega_num(input, character){
if (input.value.length <=7){
input.value += character}
if (input.value.length >7)
{ document.form.dgv.focus()
document.form.dgv.value=""
//document.form.dgv.value+=character
}
}
function agrega_K(input, character)
{if (input.value.length <=0){
input.value += character}
}
function borra_num(input)
{
input.value = input.value.substring(0, input.value.length - 1)
}
<!-- -->
</script>
<body>
<form name="form">
<table width="139" border="0">
<tr>
<td width="61"><input name="rut" type="text" size="10" maxlength="10"></td>
<td width="68">-
<input name="dgv" type="text" id="dgv" size="1" maxlength="1" ></td>
</tr>
</table>
<table width="90" border="0">
<tr>
<td width="29"><input type="button" name="Button" value="1" onClick="agrega_num(this.form.rut,'1')"></td>
<td width="28" align="center"><input type="button" name="Submit2" value="2" onClick="agrega_num(this.form.rut,'2')"></td>
<td width="32"><input type="button" name="Submit4" value="3" onClick="agrega_num(this.form.rut,'3')"></td>
</tr>
<tr>
<td><input type="button" name="Submit6" value="4" onClick="agrega_num(this.form.rut,'4')"></td>
<td align="center"><input type="button" name="Submit5" value="5" onClick="agrega_num(this.form.rut,'5')"></td>
<td><input type="button" name="Submit3" value="6" onClick="agrega_num(this.form.rut,'6')"></td>
</tr>
<tr>
<td><input type="button" name="Submit7" value="7"onClick="agrega_num(this.form.rut, '7')"></td>
<td align="center"><input type="button" name="Submit8" value="8" onClick="agrega_num(this.form.rut,'8')"></td>
<td><input type="button" name="Submit9" value="9" onClick="agrega_num(this.form.rut,'9')"></td>
</tr>
<tr>
<td><input type="button" name="Button2" value="K" onClick="agrega_num(this.form.dgv,'K')"></td>
<td><input name="button" type="button"
onClick="borra_num(this.form.rut)" value="<-"></td>
<td> </td>
</tr>
</table>
<p> </p>
</form>
</body>
</html>