Calculos den javascript

[goizgoiz]

buenos días,

A ver si alguien me puede ayudar. Es muy urgente.
Necesito hacer un javascript con un calculo de necesidades. Es para una empresa de calefacción. Teneis un ejemplo en...

http://www.leroymerlin.es/mpng2-fron...=zonecatalogue

Tengo que hacer una cosa de estas pero no tengo ni idea.
¿como puedo sumar el valor de un input con el de un textfield?

Os lo pongo más claro, lo que tengo que hacer es lo siguiente:

cantidad que meta el usuario +2 = y
y * 85* cantidad que seleccione el usuai(un input)= TOTAL


Por favor si alguien sabe como hacer esto...

ayudarme.

Gracias con antelación.

[goizgoiz]

Lo que tengo hasta ahora es simple pero no me sale:

Os pongo el codigo a ver que pasa: no es php eh?

Código PHP:

  <form action="" method="post" name="Myform" id="Myform"> 
                                        <table width="99%" border="0" cellspacing="0" cellpadding="3"> 
                                          <tr> 
                                            <td width="11%" align="left">&nbsp;</td> 
                                            <td width="35%" align="left">Factor geogr&aacute;fico:</td> 
                                            <td colspan="2" align="left" valign="middle" class="texto"><table width="81%" border="0" cellspacing="3" cellpadding="0"> 
                                                <tr> 
                                                  <td><input name="factor" type="radio" value="1"> 
                                                    1</td> 
                                                  <td><input name="factor" type="radio" value="2"> 
                                                    2</td> 
                                                  <td><input name="factor" type="radio" value="3"> 
                                                    3</td> 
                                                  <td><input name="factor" type="radio" value="4"> 
                                                    4</td> 
                                                  <td><input name="factor" type="radio" value="5"> 
                                                    5</td> 
                                                </tr> 
                                            </table></td> 
                                          </tr> 
                                          <tr> 
                                            <td align="left">&nbsp;</td> 
                                            <td align="left">Superficie de la estancia: </td> 
                                            <td width="39%" align="left"><input name="superficie" type="text" class="texto" id="superficie"> 
                                              m2</td> 
                                            <td width="15%" colspan="-3" rowspan="2" align="left">&nbsp;</td> 
                                          </tr> 
                                          <tr> 
                                            <td align="left">&nbsp;</td> 
                                            <td align="left">Tipo de estancia: </td> 
                                            <td align="left"><table width="60%" border="0" cellspacing="3" cellpadding="0"> 
                                                <tr> 
                                                  <td width="30%"><input name="estancia" type="radio" value="salon"></td> 
                                                  <td width="70%">Sal&oacute;n</td> 
                                                </tr> 
                                                <tr> 
                                                  <td><input name="estancia" type="radio" value="dormitorio"></td> 
                                                  <td>Dormitorio</td> 
                                                </tr> 
                                                <tr> 
                                                  <td><input name="estancia" type="radio" value="cocina"></td> 
                                                  <td>Cocina</td> 
                                                </tr> 
                                                <tr> 
                                                  <td><input name="estancia" type="radio" value="ba&ntilde;o"></td> 
                                                  <td>Ba&ntilde;o</td> 
                                                </tr> 
                                                <tr> 
                                                  <td><input name="estancia" type="radio" value="pasillo"></td> 
                                                  <td>Pasillo</td> 
                                                </tr> 
                                            </table></td> 
                                          </tr> 
                                          <tr> 
                                            <td align="left">&nbsp;</td> 
                                            <td align="left">&nbsp;</td> 
                                            <td align="left">&nbsp;</td> 
                                            <td colspan="-3" align="left">&nbsp;</td> 
                                          </tr> 
                                          <tr> 
                                            <td align="left">&nbsp;</td> 
                                            <td align="left">&nbsp;</td> 
                                            <td align="left"><input name="resultado" type="text" id="resultado"></td> 
                                            <td colspan="-3" align="left"><input type="submit" name="Submit" value="Calcular" onClick="sumar()"></td> 
                                          </tr> 
                                        </table> 
                                                                            </form>  
   

Bueno pues gracias

[goizgoiz]

Nadie sabe hacer esto?

ayuda por favor

[rol2007]

cual es el calculo?
lo del radio x input??

[goizgoiz]

Lo del textfield + 2

Lo que de en esa operación * 85
y lo que de * el input que haya elegido el usuario ( 1, 2, 3, 4, 5)

Sabes como es?

[rol2007]

Código HTML:

<html>
<body>
<script>
function multiplicar(){
m1 = document.getElementById("superficie").value;
tot= (m1+2)*85;
 
 if (document.Myform.factor1.checked){
 m2 = document.getElementById("factor1").value;
 tot=tot*m2
 }
 if (document.Myform.factor2.checked){
  m2 = document.getElementById("factor2").value;
 tot=tot*m2
}
 if (document.Myform.factor3.checked){
  m2 = document.getElementById("factor3").value;
 tot=tot*m2}
 if (document.Myform.factor4.checked){
  m2 = document.getElementById("factor4").value;
 tot=tot*m2}
 if (document.Myform.factor5.checked){
 m2 = document.getElementById("factor5").value;
 tot=tot*m2
}

 document.getElementById("resultado").value = tot;
 }
</script>
<form   method="post" name="Myform" id="multiplicar" onsubmit="multiplicar();">
                                        <table width="99%" border="0" cellspacing="0" cellpadding="3">
                                          <tr>
                                            <td width="11%" align="left">&nbsp;</td>
                                            <td width="35%" align="left">Factor geogr&aacute;fico:</td>
                                            <td colspan="2" align="left" valign="middle" class="texto"><table width="81%" border="0" cellspacing="3" cellpadding="0">
                                                <tr>
                                                  <td><input name="factor1" type="radio" value="1" id="factor1">
                                                    1</td>
                                                  <td><input name="factor2" type="radio" value="2" id="factor2">
                                                    2</td>
                                                  <td><input name="factor3" type="radio" value="3" id="factor3">
                                                    3</td>
                                                  <td><input name="factor4" type="radio" value="4" id="factor4">
                                                    4</td>
                                                  <td><input name="factor5" type="radio" value="5" id="factor5">
                                                    5</td>
                                                </tr>
                                            </table></td>
                                          </tr>
                                          <tr>
                                            <td align="left">&nbsp;</td>
                                            <td align="left">Superficie de la estancia: </td>
                                            <td width="39%" align="left"><input name="superficie" type="text" class="texto" id="superficie" >
                                              m2</td>
                                            <td width="15%" colspan="-3" rowspan="2" align="left">&nbsp;</td>
                                          </tr>
                                          <tr>
                                            <td align="left">&nbsp;</td>
                                            <td align="left">Tipo de estancia: </td>
                                            <td align="left"><table width="60%" border="0" cellspacing="3" cellpadding="0">
                                                <tr>
                                                  <td width="30%"><input name="estancia" type="radio" value="salon"></td>
                                                  <td width="70%">Sal&oacute;n</td>
                                                </tr>
                                                <tr>
                                                  <td><input name="estancia" type="radio" value="dormitorio"></td>
                                                  <td>Dormitorio</td>
                                                </tr>
                                                <tr>
                                                  <td><input name="estancia" type="radio" value="cocina"></td>
                                                  <td>Cocina</td>
                                                </tr>
                                                <tr>
                                                  <td><input name="estancia" type="radio" value="ba&ntilde;o"></td>
                                                  <td>Ba&ntilde;o</td>
                                                </tr>
                                                <tr>
                                                  <td><input name="estancia" type="radio" value="pasillo"></td>
                                                  <td>Pasillo</td>
                                                </tr>
                                            </table></td>
                                          </tr>
                                          <tr>
                                            <td align="left">&nbsp;</td>
                                            <td align="left">&nbsp;</td>
                                            <td align="left">&nbsp;</td>
                                            <td colspan="-3" align="left">&nbsp;</td>
                                          </tr>
                                          <tr>
                                            <td align="left">&nbsp;</td>
                                            <td align="left">&nbsp;</td>
                                            <td align="left"><input name="resultado" type="text" id="resultado"></td>
                                            <td colspan="-3" align="left"><input type="button" name="Submit" value="Calcular" onclick="multiplicar();" ></td>
                                          </tr>
                                        </table> 

no es la mas apropiada.......pero ahi te hize una muestra, trata de ver otras opciones esta la hize muy apurado.....toy en el trabajo

[goizgoiz]

Jo te lo agradezco mucho pero creo que no funciona, eh?
No me escribe el resultado.

Gracias de todas formas