Ciao a tutti, sono disperato sono 2 giorni che tento invano di trovare una soluzione, ho un calendario interamente in js,ma cliccando sulle icone grafiche per avanzare o diminuire di un mese non succede nulla, la pagina che richiama la funzione contiene solo la chiamata della funzione che passa come parametro lo zero,e quindi ecco il codice js:

function show_calendar(str_datetime) {
var arr_months = ["Gennaio","Febbraio","Marzo","Aprile","Maggio","Gi ugno","Luglio","Agosto","Settembre","Ottobre","Nov embre","Dicembre"];
var week_days = ["Dom","Lun","mar","Mer","Gio","Ven","Sab"];
var n_weekstart = 1; // day week starts from (normally 0 or 1)

var dt_datetime=(str_datetime ==0 ? new Date() : str_datetime);
var dt_prev_month=new Date(dt_datetime);
dt_prev_month.setMonth(dt_datetime.getMonth()-1);
var dt_next_month =new Date(dt_datetime);
dt_next_month.setMonth(dt_datetime.getMonth()+1);
var dt_firstday=new Date(dt_datetime);
dt_firstday.setDate(1);
dt_firstday.setDate(1-(7+dt_firstday.getDay()-n_weekstart)%7);
var dt_lastday = new Date(dt_next_month);
dt_lastday.setDate(0);


//stringa che contiene il contenuto da stampare
var str_buffer = new String (
"<table width=\"10%\">\n"+
"<tr><td bgcolor=\"#4682B4\">\n"+
"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
"<tr>\n <td bgcolor=\"#4682B4\"><a href=\"javascript:show_calendar('"+dt2dtstr(dt_pre v_month)+"');\">"+
"<img src=\"prev.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"previous month\"></a></td>\n"+
"<td bgcolor=\"#4682B4\" colspan=\"5\">"+
"<font color=\"white\" face=\"tahoma, verdana\" size=\"2\">"
+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</font></td>\n"+
"<td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:show_calendar('"+dt2dtstr(dt_nex t_month)+"');\">"+
"<img src=\"next.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"next month\"></a></td>\n</tr>\n");

var dt_current_day = new Date(dt_firstday);
// print weekdays titles
str_buffer += "<tr>\n";
for (var n=0; n<7; n++)
str_buffer += " <td bgcolor=\"#87CEFA\">"+
"<font color=\"white\" face=\"tahoma, verdana\" size=\"2\">"+
week_days[(n_weekstart+n)%7]+"</font></td>\n";
// print calendar table
str_buffer += "</tr>\n";
while (dt_current_day.getMonth() == dt_datetime.getMonth() ||
dt_current_day.getMonth() == dt_firstday.getMonth()) {
// print row heder
str_buffer += "<tr>\n";
for (var n_current_wday=0; n_current_wday<7; n_current_wday++) {
if (dt_current_day.getDate() == dt_datetime.getDate() &&
dt_current_day.getMonth() == dt_datetime.getMonth())
// print current date
str_buffer += " <td bgcolor=\"#FFB6C1\" align=\"right\">";
else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
// weekend days
str_buffer += " <td bgcolor=\"#DBEAF5\" align=\"right\">";
else
// print working days of current month
str_buffer += " <td bgcolor=\"white\" align=\"right\">";

if (dt_current_day.getMonth() == dt_datetime.getMonth())
// print days of current month
"<font color=\"black\" face=\"tahoma, verdana\" size=\"2\">";
else
// print days of other months
"<font color=\"gray\" face=\"tahoma, verdana\" size=\"2\">";
str_buffer += dt_current_day.getDate()+"</font></a></td>\n";
dt_current_day.setDate(dt_current_day.getDate()+1) ;
}
// print row footer
str_buffer += "</tr>\n";
}
// print calendar footer
str_buffer +=
"</table>\n" +
"</tr>\n</td>\n</table>\n";

document.write(str_buffer);
document.close();
}


function dt2dtstr (dt_datetime) {
return (new String (
dt_datetime.getDate()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getFullYear()+" "));
}


Aiutatemi vi pregoooo!!