var xwidth = 200;
var xheight = 180;
var browser = document.layers ? 0 : document.all ? 1 : 2;


// colori
var backtable = '#99BBDD';
var calendback = '#FFFFFF';
var lines = '#404040';
var bright = '#000000';
var festa = '#FEC208';

// ------ Non cambiare ----------
var mesi = new Array('Gennaio', 'Febbraio', 'Marzo', 'Aprile', 'Maggio', 'Giugno', 'Luglio', 'Agosto', 'Settembre', 'Ottobre', 'Novembre', 'Dicembre');

var days = new Array('Lu', 'Ma', 'Me', 'Gi', 'Ve', 'Sa', 'Do');
var dd = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

var today = new Date();
var anno = today.getFullYear();
var mese = today.getMonth();
var currday = today.getDate();
var cellwidth = Math.floor(xwidth / 7);
xwidth = cellwidth * 7;
var xmese = 0;
var aboutx = false;
var isOn = false;

function action(g, m , a) {
   function format(x) {
      return x > 9 ? x : "0" + x;
   }
   getId().showIt(false);

   if (tipo == 0) {
      source[0].value = format(g);
      source[1].value = format(m + 1);
      source[2].value = a;
   }
   else
      source.value = format(g) + '/' + format(m + 1) + '/' + a;

	if (UpdateFinishDate) {
			UpdateFinishDate ();
	}

}

document.write('<style type="text/css">\n<!--');
document.write('.cal { font-family: Arial, Helvetica, sans-serif; font-size: 10px; font-weight: bold; color: #000099}');
document.write('.num { font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-decoration:none}');
document.write('.mese { font-family: Arial, Helvetica, sans-serif; font-size: 12px; font-weight: bold; color: #663300}');
document.write('.butt { font-family: Arial, Helvetica, sans-serif; font-size: 10px}');
document.write('-->\n</style>');

function comparedate(d1, d2) {
   if (d1.getFullYear() == d2.getFullYear() && d1.getMonth() == d2.getMonth() && d1.getDate() == d2.getDate()) 
      return true;
   return false;
}

function pasqua(aa) {
   var xx = new Array(22, 22, 23, 23, 24, 24);
   var yy = new Array(2, 2, 3, 4, 5, 5);
   var a = aa % 19;
   var b = aa % 4;
   var c = aa % 7;

   var i = Math.floor(aa / 100) - 15;
   var x = xx[i], y = yy[i];
   var d = (19*a + x) % 30;
   var e = (2*b + 4*c + 6 * d + y) % 7;

   var p = 22 + d + e;

   var m = 300;
   if (p > 31) {
      m = 400;
      p = p - 31;
   }
   return m + p;
}

function isfesta(d) {
   var feste = new Array(0, 101, 106, 425, 501, 602, 815, 1101, 1208, 1225, 1226);

   if (d.getDay() == 0)
      return true;

   var pp = pasqua(d.getFullYear()) + 1;     // Pasquetta
      if (pp % 100 > 31)
         pp = 401;

   feste[0] = pp;
   for (var i = 0; i < feste.length; i++)
      if (Math.floor(feste[i] / 100) == d.getMonth() + 1) {
         var gg = feste[i] % 100;
         if (gg == d.getDate())
            return true;
      }

   return false;
}

function calendar(currday, mese, anno) {

   var dx = 2 - (new Date(anno, mese, 1)).getDay();
   if (dx == 2)
      dx = -5;
   var daysInMonth = dd[mese];

   if (mese == 1) {
      if (anno % 4 == 0 && anno % 100 != 0  || anno % 400 == 0)
         daysInMonth++
   }

   var tx = '<div class="mese" align="center">&nbsp;&nbsp;' + mesi[mese] + ' ' + anno +'</div>\n';
   tx += '<table width="' + xwidth + '" border="0" cellspacing="1" cellpadding="1">\n';
   tx += '<tr align="right">\n';

   for (var i = 0; i < 7; i++)
      tx += '<td width="' + cellwidth+ '" class="cal">' + days[i] + '&nbsp;</td>\n';

   tx += '</tr>\n';
   for (var j = 0; j < 6; j++) {
      tx += '<tr bgcolor="' + calendback + '" align="right">\n';
      for (var i = 0; i < 7; i++) {
         var bgstring = "";
         var fgcol = lines;
         var fgstring = '&nbsp;';

         if (dx > 0 && dx <= daysInMonth) {
            fgstring = dx;
            var ddx = new Date(anno, mese, dx);
            if (isfesta(ddx)) {
               bgstring = ' bgcolor="' + festa + '"';
            }
            if (comparedate(ddx, today)) {
               fgcol = bright;
               fgstring = '<b><u>' + dx + '</u></b>\n';
            }
            var tempdate = ddx.getDate() + ", " + ddx.getMonth() + ", " + ddx.getFullYear();
            fgstring = '<a href="javascript:action(' + tempdate + ')" class = "num"><font color="' + fgcol + '">' + fgstring + '</font></a>\n';
         }
         tx += '<td width="' + cellwidth + '" class="num"' + bgstring + '>\n';
         tx += fgstring;
         tx += '</td>\n';
         dx++;
      }
      tx += '</tr>\n';
   }
   tx += '</table>\n';

   return tx;
}

function dataframe(x) {
	var s = '<table width="' + xwidth + '" border="1" cellspacing="0" cellpadding="0" bgcolor="' + backtable + '">';
	s += '<tr><td class="mese" valign="middle">';
	s += x; // calendar(currday, mese, anno);
	s += '</td></tr><tr><td>';
	s += '<form class="butt"><table width="100%" border="0" cellspacing="0" cellpadding="2">';
	s += '<tr>';
//	s += '<td><input type="button" name="about" value="about" class="butt" onclick="xabout()"></td>';
	s += '<td align="left"><a href="#" onClick="altro_mese(-1)">';
	s += '<img src="/immagini/arrowl.gif" class="butt" border="0"></a></td>';
	s += '<td align="center"><a href="#" onClick="getId().showIt(false);" class="mese">chiudi</a></td>';
	s += '<td align="right"><a href="#" onClick="altro_mese(1)">';
	s += '<img src="/immagini/arrowr.gif" class="butt" border="0"></a></td>';
	s += '</tr></form></table>';
	s += '</td></tr></table>';
	return s;
}

function altro_mese(x) {
	xmese += x;
	if (x == 9)
		xmese = 0;
	var xday = (xmese == 0)? currday : 99;
	var mm = (mese + xmese) % 12;

	while (mm < 0)
		mm += 12;

	var s = dataframe(calendar(xday, mm, anno + Math.floor((mese + xmese) / 12)));
	writeLayer(s);
	aboutx = false;
}

function getId() {
	switch (browser) {
		case 0:
			return document.layers.calframe;
		case 1:
			return eval('calframe');
		case 2:
			return document.getElementById("calframe");
	}
}

function moveLayer(xPos, yPos) {
	switch (browser) {
	case 0:
		this.left = xPos;
		this.top = yPos;
	 break;
	case 1:
		this.style.pixelLeft = xPos;
		this.style.pixelTop = yPos;
	 break;
	default:
		this.style.left = xPos;
		this.style.top = yPos;
	}
}

function createlayer() {
	var s;
	if (document.layers)
		s = "<layer id=\"calframe\" visibility=\"hide\" z-index=1>";
	else
		s = "<div id=\"calframe\" style=\"position:absolute; visibility: hidden\">";
	if (document.layers)
		s += '</layer>';
	else
		s += '</div>';

	document.writeln(s);
}

function showIt(on) {
	isOn = on;
	if (browser)
		this.style.visibility = (on) ? "visible" : "hidden";
	else
		this.visibility = (on) ? "show" : "hide"
}

function writeLayer(s) {
	var id = getId();
	if (browser)
		id.innerHTML = s;
	else {
		id.document.open();
		id.document.write(s);
		id.document.close();
	}
}

function init() {
	var id = getId();
	id.moveLayer = moveLayer;
	id.showIt = showIt;
	id.showIt(false);
}

function showCalendar(d, xpos, ypos) {
	if (!isOn) {   
		if (d) {
			anno = d.getFullYear();
			mese = d.getMonth();
			currday = d.getDate();
		}else{
			anno = today.getFullYear();
			mese = today.getMonth();
			currday = today.getDate();
		}
		if (arguments.length > 2) {
			var id = getId();
			id.moveLayer(xpos, ypos);
		}
		else
			getId().moveLayer(100, 100);
		xmese = 0;
		writeLayer(dataframe(calendar(currday, mese, anno)));		
	}
	getId().showIt(!isOn);
}

createlayer(1);
onload = init;