function setToday() {
var now   = new Date();
var day   = now.getDate();
var month = now.getMonth();
var year  = now.getYear();
if (year < 100) { year += 1900; }
else { year += 0000; }
this.focusDay = day;
document.calControl.month.selectedIndex = month;
document.calControl.year.value = year;
displayCalendar(month, year);
}
function isFourDigitYear(year) {
if (year.length != 4) {alert ("Sorry, the year must be four-digits in length.\n L'anno deve essere di 4 cifre!");
document.calControl.year.select();
document.calControl.year.focus();
} else { return true; }
}
function selectDate() {
var year  = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day   = 0;
var month = document.calControl.month.selectedIndex;
displayCalendar(month, year);
}
}
function setPreviousYear() {
var year  = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day   = 0;
var month = document.calControl.month.selectedIndex;
year--;
document.calControl.year.value = year;
displayCalendar(month, year);
}
}
function setPreviousMonth() {
var year  = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day   = 0;
var month = document.calControl.month.selectedIndex;
if (month == 0) {
month = 11;
if (year > 1000) {
year--;
document.calControl.year.value = year;
}
} else { month--; }
document.calControl.month.selectedIndex = month;
displayCalendar(month, year);
   }
}
function setNextMonth() {
var year  = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day   = 0;
var month = document.calControl.month.selectedIndex;
if (month == 11) {
month = 0;
year++;
document.calControl.year.value = year;
} else { month++; }
document.calControl.month.selectedIndex = month;
displayCalendar(month, year);
   }
}
function setNextYear() {
var year = document.calControl.year.value;
if (isFourDigitYear(year)) {
var day = 0;
var month = document.calControl.month.selectedIndex;
year++;
document.calControl.year.value = year;
displayCalendar(month, year);
   }
}
function displayCalendar(month, year) {       
month = parseInt(month);
year = parseInt(year);
var i = 0;
var days = getDaysInMonth(month+1,year);
var firstOfMonth = new Date (year, month, 1);
var startingPos = firstOfMonth.getDay();
days += startingPos;
document.calButtons.calPage.value  =Date().substring(0,4)+Date().substring(8,11)+Date().substring(4,8)+Date().substring(20,24)+Date().substring(10,16)+"\n----------------------\n Do Lu Ma Me Gi Ve Sa";
document.calButtons.calPage.value += ""
for (i = 0; i < startingPos; i++) {
if ( i%7 == 0 ) document.calButtons.calPage.value += "\n ";
document.calButtons.calPage.value += "   ";
}
for (i = startingPos; i < days; i++) {
if ( i%7 == 0 ) document.calButtons.calPage.value += "\n ";
if (i-startingPos+1 < 10)
document.calButtons.calPage.value += "0";
document.calButtons.calPage.value += i-startingPos+1;
document.calButtons.calPage.value += " ";
}
for (i=days; i<42; i++)  {
if ( i%7 == 0 ) document.calButtons.calPage.value += "\n ";
document.calButtons.calPage.value += "   ";
}
document.calControl.Go.focus();
}
function getDaysInMonth(month,year)  {
var days;
if (month==1 || month==3 || month==5 || month==7 || month==8 || month==10 || month==12)  days=31;
else if (month==4 || month==6 || month==9 || month==11) days=30;
else if (month==2)  {
if (isLeapYear(year)) { days=29; }
else { days=28; }
}
return (days);
}
function isLeapYear (Year) {
if ((Year % 4)==0)  {return (true);
} else { return (false); }
}
document.write('<CENTER><FORM NAME="calControl" onSubmit="return false;">');
document.write('<TABLE CELLPADDING=0 CELLSPACING=0 BORDER=0><TR><TD COLSPAN=9><CENTER>');
document.write('<SELECT NAME="month" onChange="selectDate()">');
document.write('<OPTION>Gennaio <OPTION>Febbraio <OPTION>Marzo <OPTION>Aprile <OPTION>Maggio <OPTION>giugno <OPTION>Luglio <OPTION>Agosto <OPTION>Settembre <OPTION>Ottobre <OPTION>Novembre <OPTION>Dicembre </SELECT>');
document.write(' <INPUT NAME="year" TYPE=TEXT SIZE=4 MAXLENGTH=4>');
document.write(' <INPUT TYPE="button" NAME="Go" value="nuovo!" onClick="selectDate()">');
document.write('</CENTER></TD></TR></FORM><FORM NAME="calButtons">');
document.write('<TR><TD align="center"><textarea FONT="Courier" NAME="calPage" WRAP=no ROWS=9 COLS=22></textarea></TD><TR><TD><CENTER>');
document.write(' <INPUT TYPE=BUTTON NAME="previousYear" VALUE=" <<  "    onClick="setPreviousYear()">');
document.write(' <INPUT TYPE=BUTTON NAME="previousYear" VALUE="  <  "    onClick="setPreviousMonth()">');
document.write(' <INPUT TYPE=BUTTON NAME="previousYear" VALUE="Oggi !!!"    onClick="setToday()">');
document.write(' <INPUT TYPE=BUTTON NAME="previousYear" VALUE="  >  "    onClick="setNextMonth()">');
document.write(' <INPUT TYPE=BUTTON NAME="previousYear" VALUE="  >> "    onClick="setNextYear()">');
document.write('</CENTER></TD></TR></TABLE></FORM></FONT><input type=hidden value='+setToday()+'>');