promediar texbox

[ElAprendiz]

necesito un script que sume las cantidades y las promedie de varios textbox y los muestre en otro textbox..gracias maestros

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[unKnown]

intentalo asi

&lt;script language=&quot;Javascript&quot;&gt;
&lt;!--
function promedia(form)
{
r=(parseInt(form.a.value)+parseInt(form.b.value))/2
form.rs.value=r
}
//--&gt;
&lt;/script&gt;

&lt;form&gt;
&lt;input name=&quot;a&quot; type=&quot;text&quot; value=&quot;&quot;&gt;
&lt;br&gt;
&lt;input name=&quot;b&quot; type=&quot;text&quot; value=&quot;&quot;&gt;
&lt;br&gt;
&lt;input name=&quot;rs&quot; type=&quot;text&quot; value=&quot;resultado&quot;&gt;
&lt;input type=&quot;button&quot; value=&quot;Promedio&quot; onclick=&quot;promedia(this.form)&quot;&gt;
&lt;/form&gt;


es un ejemplo sencillo pero te dara una idea de como hacerlo en tu casoa

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[ElAprendiz]

gracias..me resulto ..pero quiero modificarlo y no se mucho de javascript :(

el problema es que el numero de textbox es variable, por lo cual necesito sacar el promedio de solamente los textbox que contengan datos.

tengo este script que permite solo ingresar numeros

&lt;script language=&quot;JavaScript&quot;&gt;
&lt;!--// *** ESTE SCRIPT PERMITE INGRESAR SOLO NUMEROS EN LOS TEXTBOX ****
var nav4 = window.Event ? true : false;
function acceptNum(evt){
// NOTE: Backspace = 8, Enter = 13, '0' = 48, '9' = 57
var key = nav4 ? evt.which : evt.keyCode;
return (key &lt;= 13 || (key &gt;= 48 &amp;&amp; key &lt;= 57));
}
//--&gt;
&lt;/script&gt;

&lt;script language=&quot;Javascript&quot;&gt;
&lt;!--
function promedia(form)
{
r=(parseInt(form.dato1.value)+parseInt(form.dato2. value))/2
form.rs.value=r
}
//--&gt;
&lt;/script&gt;

y los datos los lee desde aca:

&lt;TD&gt;&lt;input type=&quot;text&quot; name=&quot;Dato1&quot; onKeyPress=&quot;return acceptNum(event)&quot;&gt;&lt;/TD&gt;
&lt;TD&gt;&lt;input type=&quot;text&quot; name=&quot;Dato2&quot; onKeyPress=&quot;return acceptNum(event)&quot;&gt;&lt;/TD&gt;

como integro los dos scripts??????????

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[unKnown]

intenta con esto



&lt;script language=&quot;JavaScript&quot;&gt;
var nav4 = window.Event ? true : false;
function acceptNum(evt){
var key = nav4 ? evt.which : evt.keyCode;
return (key &lt;= 13 || (key &gt;= 48 &amp;&amp; key &lt;= 57));
}

&lt;/script&gt;

&lt;script language=&quot;Javascript&quot;&gt;

function promedia(form)
{
a=0;z=0
if(form.Dato1.value!=&quot;&quot;){z++
a+=parseInt(form.Dato1.value)}
if(form.Dato2.value!=&quot;&quot;){z++
a+=parseInt(form.Dato2.value)}
if(form.Dato3.value!=&quot;&quot;){z++
a+=parseInt(form.Dato3.value)}
if(form.Dato4.value!=&quot;&quot;){z++
a+=parseInt(form.Dato4.value)}


form.rs.value=a/z


}

&lt;/script&gt;

y los datos los lee desde aca:

&lt;form&gt;
&lt;input type=&quot;text&quot; name=&quot;Dato1&quot; onKeyPress=&quot;return acceptNum(event)&quot;&gt;&lt;br&gt;
&lt;input type=&quot;text&quot; name=&quot;Dato2&quot; onKeyPress=&quot;return acceptNum(event)&quot;&gt;&lt;br&gt;
&lt;input type=&quot;text&quot; name=&quot;Dato3&quot; onKeyPress=&quot;return acceptNum(event)&quot;&gt;&lt;br&gt;
&lt;input type=&quot;text&quot; name=&quot;Dato4&quot; onKeyPress=&quot;return acceptNum(event)&quot;&gt;&lt;br&gt;

&lt;input name=&quot;rs&quot; type=&quot;text&quot; value=&quot;Promedio&quot;&gt;
&lt;input onclick=&quot;promedia(this.form)&quot; type=&quot;button&quot; value=&quot;Promedia&quot;&gt;
&lt;/form&gt;

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[ElAprendiz]

haber compadre el script limpiecito. aunque no se si funciona

<script language="JavaScript">
var nav4 = window.Event ? true : false;
function acceptNum(evt){
var key = nav4 ? evt.which : evt.keyCode;
return (key <= 13 || (key >= 48 && key <= 57));
}

</script>

<script language="Javascript">

function promedia(form)
{
a=0;z=0
if(form.Dato1.value!=""){z++
a+=parseInt(form.Dato1.value)}
if(form.Dato2.value!=""){z++
a+=parseInt(form.Dato2.value)}
if(form.Dato3.value!=""){z++
a+=parseInt(form.Dato3.value)}
if(form.Dato4.value!=""){z++
a+=parseInt(form.Dato4.value)}


form.rs.value=a/z

}

</script>

y los datos los lee desde aca:
<form>
<input type="text" name="Dato1" onKeyPress="return acceptNum(event)"><br>
<input type="text" name="Dato2" onKeyPress="return acceptNum(event)"><br>
<input type="text" name="Dato3" onKeyPress="return acceptNum(event)"><br>
<input type="text" name="Dato4" onKeyPress="return acceptNum(event)"><br>

<input name="rs" type="text" value="Promedio">
<input onclick="promedia(this.form)" type="button" value="Promedia">
</form>