Grandioso. Funziona! grazie.

Posso chiederti anche un'altra cosa.

Ho questo script sempre recuperato in giro per internet che mi dovrebbe calcolare un preventivo spesa.

Codice PHP:

<form method="post" action="cart.php">

<input type="hidden" name="gioco" value="Call of Duty">

 

<div align=center><table><tr><td>[b]Game[/b]</td><td>

<select name="game" id="gametype" onChange="changePrice();" style="width:175px">

                                <option value="cod2">Call of Duty 2</option>

                                  <option value="cod4">Call of Duty 4</option>

                                <option value="cod5">Call of Duty 5</option>

                                <option value="cod6">Call of Duty 6</option>

                                <option value="cod8">Call of Duty MW3</option>

                                <option value="cs">Counter Strike</option>

                                <option value="css">Counter Strike: Source</option>

                                <option value="css">San Andreas MP</option>

 

                    </select></td></tr><tr><td>

                    [b]Slots[/b]</td><td>

                    <select name="player" id="player" onChange="changePrice();" style="width:175px">

                                <option value="10">10 Slots</option>

                                <option value="12">12 Slots</option>

                                <option value="14">14 Slots</option>

                                <option value="16">16 Slots</option>

                                <option value="18">18 Slots</option>

                                <option value="20">20 Slots</option>

                                <option value="22">22 Slots</option>

                                <option value="24">24 Slots</option>

                                <option value="26">26 Slots</option>

                                <option value="32">32 Slots</option>

 

 

                    </select></td></tr><tr><td>

 

[b]Tipo Server[/b]</td><td>

        <select name="type" id="type" onChange="changePrice();" style="width:175px">

                                 <option value="2">Pubblico</option>

                                <option value="1">Privato</option>

                    </select></td></tr><tr><td>

 

[b]Tag GameHost.it[/b]</td><td>

<select id="tag" name="tag" onChange="changePrice();" style="width:175px">

<option value="0">Prima il nome</option>

<option value="1">Dopo il nome</option>

<option value="3">No</option>

</select>

</td></tr><tr><td>

[b]Durata[/b]</td><td>

<select id="period" name="period" onChange="changePrice();" style="width:175px">

                        

                                <option value="270">Trimestrale (-10%)</option>

                                <option value="510">Semestrale (-15%)</option>

                                <option value="900">Annuale (-25%)</option>

                    </select>

</td></tr><tr><td>

[b]Location[/b]</td><td>

        <select id="locationserver" name="location" onChange="changePrice();" style="width:175px">

                        <option value="mln">Milano</option>

                        <option value="prg">Parigi</option>

                    </select>

</td></tr></table>



</div>


<center>[b]Prezzo  &euro;[/b]

<input name="totalprice" id="totalprice" type="text" style="background: #FFF;" onFocus="this.blur()" value="16" size=10>      



<input name="invio" style="background-color: #FFF; border: Solid 1px #DDD; font-weight: bold;" type="submit" style="background: #FFF;" value="Aggiungi al carrello" size=10>

 </center>



</form>

<script language="JavaScript" type="text/JavaScript">

function roundNumber(num, dec) {

        var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);

        return result;

 

}

function changePrice()

{

 

var totalt = document.getElementById("totalprice");

var slot = document.getElementById("player");

var period = document.getElementById("period");

var type = document.getElementById("type");

var tag = document.getElementById("tag");

slot = parseFloat(slot[slot.selectedIndex].value);

type = parseFloat(type[type.selectedIndex].value);

tag = parseFloat(tag[tag.selectedIndex].value);

period=parseFloat(period[period.selectedIndex].value);

totalt.value=  roundNumber((slot+type+tag)/100*period,2);

}

</script>

</div> 
Dovrei mettere un prezzo a slot a seconda del gioco che viene selezionato e metterlo nel totalt.value

Sai come posso fare?