Cosa c'è che non va in questo codice? Non mi tiene in considerazione nè la pressione di milano nè il tempo...
Codice PHP:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Fanta Meteo in collaborazione con MeteoNetwork</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
<!--
.unnamed1 {
    border: medium outset #0000FF;
    width: 800px;
}
.unnamed2 {
    width: 800px;
    border: thin none #0000FF;
    font-family: "Times New Roman", Times, serif;
    font-style: italic;
    color: #0000FF;
    font-size: 14px;
}
-->
</style>
<style type="text/css">
<!--
.unnamed3 {
    font-family: "Times New Roman", Times, serif;
    color: #0000FF;
    text-align: center;
}
-->
</style>
<style type="text/css">
<!--
.unnamed4 {
    font-family: Arial, Helvetica, sans-serif;
    color: #0000FF;
    text-align: center;
    border: thin solid #FFFF00;
}
-->
</style>
</head>

<body>
<form action="<? echo $milanorisultato?>" method="post" name="milanorisultato" id="milanorisultato">
<form action="<? echo $romarisultato?>" method="post" name="romarisultato" id="romarisultato">
<form action="<? echo $baririsultato?>" method="post" name="baririsultato" id="baririsultato">
<form action="<? echo $montescurorisultato?>" method="post" name="montescurorisultato" id="montescurorisultato">
<form action="<? echo $cagliaririsultato?>" method="post" name="cagliaririsultato" id="cagliaririsultato">
<table width="75%" border="0" align="center">
  <tr>
    <td class="unnamed1">[img]Header.jpg[/img]</td>
  </tr>
</table>
<table width="75%" border="0" align="center">
  <tr>
    <td class="unnamed2"><p align="center">[b]<font size="+1">Fantameteo 
        in collaborazione con MeteoNetwork e MeteoBingo</font>[/b]</p></td>
  </tr>
</table>
<table width="75%" border="0" align="center">
  <tr>
    <td class="unnamed2"> <table width="95%" height="178" border="1" align="center">
        <tr class="unnamed3"> 
          <td width="19%">Milano</td>
          <td width="19%">Roma</td>
          <td width="19%">Bari</td>
          <td width="20%">Monte Scuro</td>
          <td width="20%">Cagliari</td>
          <td width="20%">Dati da inserire</td>
        </tr>
        <tr class="unnamed2"> 
          <td><input name="milano850" type="text" id="milano850"></td>
          <td><input name="roma850" type="text" id="roma850"></td>
          <td><input name="bari850" type="text" id="bari850"></td>
          <td><input name="montescuro850" type="text" id="montescuro850"></td>
          <td><input name="cagliari850" type="text" id="cagliari850"></td>
          <td>Temp. 850hpa</td>
        </tr>
        <tr class="unnamed2"> 
          <td><select name="milanopressione" size="2">
              <option value="1">Alta</option>
              <option value="2">Bassa</option>
            </select></td>
          <td><select name="romapressione" size="2">
              <option value="1">Alta</option>
              <option value="2">Bassa</option>
            </select></td>
          <td><select name="baripressione" size="2">
              <option value="1">Alta</option>
              <option value="2">Bassa</option>
            </select></td>
          <td><select name="montescuropressione" size="2">
              <option value="1">Alta</option>
              <option value="2">Bassa</option>
            </select></td>
          <td><select name="cagliaripressione" size="2">
              <option value="1">Alta</option>
              <option value="2">Bassa</option>
            </select></td>
          <td>Alta o Bassa Pressione?</td>
        </tr>
        <tr class="unnamed2"> 
          <td><select name="milanotempo" size="3">
              <option value="1">Sereno</option>
              <option value="2">Pioggia</option>
              <option value="3">Temporale</option>
            </select></td>
          <td><select name="romatempo" size="3">
              <option value="1">Sereno</option>
              <option value="2">Pioggia</option>
              <option value="3">Temporale</option>
            </select></td>
          <td><select name="baritempo" size="3">
              <option value="1">Sereno</option>
              <option value="2">Pioggia</option>
              <option value="3">Temporale</option>
            </select></td>
          <td><select name="montescurotempo" size="3">
              <option value="1">Sereno</option>
              <option value="2">Pioggia</option>
              <option value="3">Temporale</option>
            </select></td>
          <td><select name="cagliaritempo" size="3">
              <option value="1">Sereno</option>
              <option value="2">Pioggia</option>
              <option value="3">Temporale</option>
            </select></td>
          <td>Che tempo ci sar&agrave;?</td>
        </tr>
        <tr class="unnamed2"> 
          <td><input type="submit" name="milanosubmit" value="Calcola"></td>
          <td><input type="submit" name="romasubmit" value="Calcola"></td>
          <td><input type="submit" name="barisubmit" value="Calcola"></td>
          <td><input type="submit" name="montescurosubmit" value="Calcola"></td>
          <td><input type="submit" name="cagliarisubmit" value="Calcola"></td>
          <td>Clicka sul pulsante per la temperatura</td>
        </tr>
        <tr class="unnamed2">
          <td><?

$m850 
$_POST['milano850'];
$p $_GET['milanopressione'];
$mt $_GET['milanotempo'];
$alt850 1400;
$altm 130;
if (
$p 1) {
$p 150;
}
elseif (
$p 2) {
$p 130;
}
if (
$mt 1) {
$mt 2;
}
elseif (
$mt 2) {
$mt 0;
}
elseif (
$mt 3) {
$mt = -1;
}
if ((!
is_numeric($m850)) || (!$p) || (!$mt)){
echo 
"<div align=\"center\">Inserisci i dati<a href=\"java-script: window.back()\"></a></div>";
}
else {
echo 
"<div align=\"center\">Temperatura: " $milanorisultato = ((($alt850 $altm) / $p) + ($m850 $mt)) . "
<a href=\"java-script: window.back()\"></a></div>"
;
}
?></td>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
        </tr>
      </table>
      

      <table width="75%" border="0" align="center" class="unnamed4">
        <tr>
          <td align="center">Fanta meteo &egrave; nato per dare l'opportunit&agrave; a tutti 
            di giocare a MeteoBingo sul forum MeteoNetwork ideato da StefanoBS. 
            Chiarisco da subito che le temperature che rilever&agrave; il calcolatore 
            non vi assicurerarro una vittoria certa, ma vi aiuter&agrave; nella 
            scelta delle temperature pi&ugrave; adatte, l'esperienza sar&agrave; 
            l'unico valore che vi permetter&agrave; di vincere! </td>
        </tr>
      </table>
      <p class="unnamed3"></p></td>
  </tr>
</table>

</body>
</html>