Ciao a tutti
ho un problema nel duplicare dei drop down menu che ho creato e che vengono popolati usando i dati di un database mysql
quando l'utente seleziona una voce dal primo menu, in base alla sua scelta, gli vengono proposte altre opzioni nel secondo menu e cosi via fino al terzo menu.
Ora vorrei duplicare questi drop down menu che devono ovviamente essere in set di 3 per dare all'utente la possibilita' di effettuare piu scelte. Una volta arrivato al terzo menu infatti la scelta e' quella definitiva (il suo valore lo utilizzero' in un form online).
Potreste aiutarmi a modificare il mio codice in modo da creare duplicati dei miei menu in set di 3 che funzionino?
Questo e' il codice che sto usando e che per ora funziona solo con il primo set di 3 menu

codice:
<html>

<head>
<title>Demo of Three Multiple drop down list box from plus2net</title>

<script language=JavaScript>
function reload(form)
{
var val=form.cat.options[form.cat.options.selectedIndex].value; 
self.location='testing_drop.php?cat=' + val ;
}
function reload3(form)
{
var val=form.cat.options[form.cat.options.selectedIndex].value; 
var val2=form.subcat.options[form.subcat.options.selectedIndex].value; 

self.location='testing_drop.php?cat=' + val + '&cat3=' + val2 ;
}

</script>

<?php
require "config.php";
///////// Getting the data from Mysql table for first list box//////////
$quer2=mysql_query("SELECT DISTINCT category,cat_id FROM category order by category"); 
///////////// End of query for first list box////////////

/////// for second drop down list we will check if category is selected else we will display all the subcategory///// 
$cat=$HTTP_GET_VARS['cat']; // This line is added to take care if your global variable is off
if(isset($cat) and strlen($cat) > 0){
$quer=mysql_query("SELECT DISTINCT subcategory,subcat_id FROM subcategory where cat_id=$cat order by subcategory"); 
}else{$quer=mysql_query("SELECT DISTINCT subcategory,subcat_id FROM subcategory order by subcategory"); } 
////////// end of query for second subcategory drop down list box ///////////////////////////

/////// for Third drop down list we will check if sub category is selected else we will display all the subcategory3///// 
$cat3=$HTTP_GET_VARS['cat3']; // This line is added to take care if your global variable is off
if(isset($cat3) and strlen($cat3) > 0){
$quer3=mysql_query("SELECT DISTINCT subcat2 FROM subcategory2 where subcat_id=$cat3 order by subcat2"); 
}else{$quer3=mysql_query("SELECT DISTINCT subcat2 FROM subcategory2 order by subcat2"); } 
////////// end of query for third subcategory drop down list box ///////////////////////////

echo "<form method=post name=f1 action='send.php'>";

//////////        Starting of first drop downlist /////////
echo "<select name='cat' onchange=\"reload(this.form)\"><option value=''>Select one</option>";
while($noticia2 = mysql_fetch_array($quer2)) { 
if($noticia2['cat_id']==@$cat){echo "<option selected value='$noticia2[cat_id]'>$noticia2[category]</option>"."
";}
else{echo  "<option value='$noticia2[cat_id]'>$noticia2[category]</option>";}
}
echo "</select>";
//////////////////  This will end the first drop down list ///////////

//////////        Starting of second drop downlist /////////
echo "<select name='subcat' onchange=\"reload3(this.form)\"><option value=''>Select one</option>";
while($noticia = mysql_fetch_array($quer)) { 
if($noticia['subcat_id']==@$cat3){echo "<option selected value='$noticia[subcat_id]'>$noticia[subcategory]</option>"."
";}
else{echo  "<option value='$noticia[subcat_id]'>$noticia[subcategory]</option>";}
}
echo "</select>";
//////////////////  This will end the second drop down list ///////////


//////////        Starting of third drop downlist /////////
echo "<select name='subcat3' ><option value=''>Select one</option>";
while($noticia = mysql_fetch_array($quer3)) { 
echo  "<option value='$noticia[subcat2]'>$noticia[subcat2]</option>";
}
echo "</select>";
//////////////////  This will end the third drop down list ///////////

?>