menù select...che dipende da un altra select

[noos]

dopo </head>



<SCRIPT>
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function updateProv()
{
var selectedprv;

if (document.searchform.sedeop_reg.options.selectedIn dex > 1)
{
curarray = eval("r" + (document.searchform.sedeop_reg.options.selectedIn dex - 1));
ccurarray = eval("c" + (document.searchform.sedeop_reg.options.selectedIn dex - 1));


lst = document.searchform.sedeop_prv.options.length;
for (i = lst; i >= 0; i--)
{ document.searchform.sedeop_prv.options[i] = null; }

document.searchform.sedeop_prv.options[0] = new Option("Seleziona la provincia", "", false, false);
for(i=0; i<curarray.length;i++)
{
document.searchform.sedeop_prv.options[i+1] = new Option(curarray[i],ccurarray[i],false,false);
if (ccurarray[i] == selectedprv) document.searchform.sedeop_prv.options[i+1].selected = true;
}
document.searchform.sedeop_prv.options[0].selected=true;




}
else
{
lst = document.searchform.sedeop_prv.options.length
for (i = lst; i >= 0; i--)
{ document.searchform.sedeop_prv.options[i] = null; }
document.searchform.sedeop_prv.options[0] = new Option("", "", true, true);
document.searchform.sedeop_prv.options[0].selected=true;

}
}

function updateProv2()
{var selectedprv;

if (document.searchform.sedeop_reg.options.selectedIn dex > 1)
{
curarray = eval("r" + (document.searchform.sedeop_reg.options.selectedIn dex - 1))
ccurarray = eval("c" + (document.searchform.sedeop_reg.options.selectedIn dex - 1))

lst = document.searchform.sedeop_prv.options.length
for (i = lst; i >= 0; i--)
{ document.searchform.sedeop_prv.options[i] = null; }

document.searchform.sedeop_prv.options[0] = new Option("Seleziona la provincia", "", false, false);
for(i=0; i<curarray.length;i++)
{
document.searchform.sedeop_prv.options[i+1] = new Option(curarray[i],ccurarray[i],false,false);
if (ccurarray[i] == selectedprv)
document.searchform.sedeop_prv.options[i+1].selected = true;
else
document.searchform.sedeop_prv.options[i+1].selected = false;
}

}
else
{
lst = document.searchform.sedeop_prv.options.length
for (i = lst; i >= 0; i--)
{ document.searchform.sedeop_prv.options[i] = null; }

document.searchform.sedeop_prv.options[0] = new Option("", "", true, true);
document.searchform.sedeop_prv.options[0].selected=true;

}
}

function updateLoc()
{
if (document.searchform.sedeop_prv.options[document.searchform.sedeop_prv.options.selectedInd ex].value != '')

document.searchform.submit();

}

function former()
{
var qstring ='';
for(i=0; i<document.searchform.elements.length; i++)
{
if(document.searchform.elements[i].type=='select-one')
qstring= qstring + document.searchform.elements[i].name + '=' + escape(document.searchform.elements[i].options[document.searchform.elements[i].selectedIndex].value) + '&'
else
qstring= qstring + document.searchform.elements[i].name + '=' + escape(document.searchform.elements[i].value) + '&'
}
if (document.searchform.localita.type=='select-one' && document.searchform.localita.options.selectedIndex >0)
{ app = document.searchform.localita.options[document.searchform.localita.options.selectedIndex].value
qstring = qstring + 'num=' + escape(app.substr(1 + app.indexOf('|', 0))) + '&'
}
if (document.searchform.localita.type=='select-one' && document.searchform.localita.options.selectedIndex >0)
{ app2 = document.searchform.localita.options[document.searchform.localita.options.selectedIndex].value
qstring = qstring + 'comune=' + escape(app2.substr(0,app.indexOf('|', 0)))
}
return qstring;
}

function CheckCampi(theForm)
{
if (theForm.sedeop_reg.selectedIndex < 2 && theForm.localita.type=='text' && theForm.localita.value=='')
{ alert("Indicare la Regione di interesse");
theForm.sedeop_reg.focus();
return (false);
}
if (theForm.sedeop_reg.selectedIndex < 2 && theForm.localita.type=='select-one')
{ alert("Indicare la Regione di interesse");
theForm.sedeop_reg.focus();
return (false);
}
if (theForm.sedeop_prv.selectedIndex == 0 && theForm.localita.type=='text' && theForm.localita.value=='')
{
alert("Indicare la Provincia di interesse");
theForm.sedeop_prv.focus();
return (false);
}
if (theForm.sedeop_prv.selectedIndex == 0 && theForm.localita.type=='select-one')
{
alert("Indicare la Provincia di interesse");
theForm.sedeop_prv.focus();
return (false);
}
if (theForm.localita.selectedIndex == 0 && theForm.localita.type=='text' && theForm.localita.value=='')
{
alert("Indicare la Comune di interesse");
theForm.localita.focus();
return (false);
}
if (theForm.localita.selectedIndex == 0 && theForm.localita.type=='select-one')
{
alert("Indicare la Comune di interesse");
theForm.localita.focus();
return (false);
}
return(true);
}

function my_win200()
{var winref;

var macrozone = ' bari bologna firenze genova milano napoli palermo roma torino verona '
var origine = 'stradivari'
var app
if (document.searchform.localita.type=='select-one' && document.searchform.localita.options.selectedIndex >0)
{ app = document.searchform.localita.options[document.searchform.localita.options.selectedIndex].value
app = escape(app.substr(0,app.indexOf('|', 0)))
}
else
app = document.searchform.localita.value

if (CheckCampi(window.document.searchform))
{
if (macrozone.search(' ' + app.toLowerCase() + ' ')!=-1)
winref = window.open('mappa.jsp?tipo1=res&tipo2=&motiv=ven& ' + former() + '&mapper=' + app.toLowerCase() + '&orig=' + origine,'mywindow','width=640,height=500,toolbar=n o,location=no,directories=no,status=no,menubar=no, scrollbars=yes,copyhistory=no,resizable=no,screenX =0,screenY=0,top=0,left=0');
else
winref = window.open('notizie_int.jsp?tipo1=res&tipo2=&moti v=ven&' + former() + '&orig=' + origine,'mywindow','width=500,height=200,toolbar=n o,location=no,directories=no,status=no,menubar=no, scrollbars=yes,copyhistory=no,resizable=no,screenX =250,screenY=250,top=100,left=100');
winref.focus();
}
}
//-->
</script>








nell'html


<select name="sedeop_reg" size="1" onchange="updateProv()">
<option value="">Seleziona la regione</option>
<option value=""> </option>
<option value="abr">ABRUZZO</option>
<option value="bas">BASILICATA</option>
<option value="cal">CALABRIA</option>
<option value="cam">CAMPANIA</option>
<option value="emi">EMILIA-ROMAGNA</option>
<option value="fvg">FRIULI-VENEZIA GIULIA</option>
<option value="laz">LAZIO</option>
<option value="lig">LIGURIA</option>
<option value="lom">LOMBARDIA</option>
<option value="mar">MARCHE</option>
<option value="mol">MOLISE</option>
<option value="pie">PIEMONTE</option>
<option value="pug">PUGLIA</option>
<option value="rsm">REPUBBLICA DI SAN MARINO</option>
<option value="sar">SARDEGNA</option>
<option value="sic">SICILIA</option>
<option value="tos">TOSCANA</option>
<option value="taa">TRENTINO-ALTO ADIGE</option>
<option value="umb">UMBRIA</option>
<option value="vdo">VALLE D'AOSTA</option>
<option value="ven">VENETO</option>
</select>

<select name="sedeop_prv" size="1" >
<option value="">Seleziona la provincia</option>
<option value=""> </option>
<option value="">--------</option>
<option value="">--------</option>
<option value="">--------</option>
</select>