// Title: Timestamp picker
// URL: http://us.geocities.com/tspicker/
// Script featured on: http://javascriptkit.com/script/script2/timestamp.shtml
// Version: 1.1b
// Date: 11-03-2008 (mm-dd-yyyy)

var g_x=100,g_y=100;

function oggi(campo){
	if (f1[campo].disabled)
		return;
	var d=new Date();
	d=Right("00"+d.getDate(),2)+"/"+Right("00"+(d.getMonth()+1),2)+"/"+d.getFullYear();
	f1[campo].value=d;
}
function oggi2(campo){
	if (ricerca[campo].disabled)
		return;
	var d=new Date();
	d=Right("00"+d.getDate(),2)+"/"+Right("00"+(d.getMonth()+1),2)+"/"+d.getFullYear();
	ricerca[campo].value=d;
}

function showcalendar(campo){
	show_calendar("document.f1."+campo,eval("document.f1."+campo+".value"));
}
function showcalendar2(campo){
	show_calendar("document.ricerca."+campo,eval("document.ricerca."+campo+".value"));
}

function show_calendar(str_target, str_datetime) {
	if (eval(str_target+'.disabled')==true)
		return;
	var arr_months = ["Gennaio", "Febbraio", "Marzo", "Aprile", "Maggio", "Giugno",
		"Luglio", "Agosto", "Settembre", "Ottobre", "Novembre", "Dicembre"];
	var week_days = ["Do", "Lu", "Ma", "Me", "Gi", "Ve", "Sa"];
	var n_weekstart = 1; // day week starts from (normally 0 or 1)

	var dt_datetime = (str_datetime == null || str_datetime =="" ?  new Date() : str2dt(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);

	// html generation (feel free to tune it for your particular application)
	// print calendar header
	var MOUSE="onMouseOver='TurnOn(this);' onMouseOut='TurnOff(this);'";
	var str_buffer = new String (
		"<html>\n"+
		"<head>\n"+
		"<link rel=stylesheet type=text/css href='css/style.css'>\n"+
		"	<title>Calendario</title>\n"+
		"</head>\n"+
		"<body bgcolor=\"White\">\n"+
		"<script language=\"JavaScript\">\n"+
		"function TurnOn(objRow) {\n"+
		"	objRow.style.cursor=\"pointer\";\n"+
		"	objRow.style.backgroundColor=\"#FFFF00\";\n"+
		"}\n"+
		"function TurnOff(objRow) {\n"+
		"	objRow.style.backgroundColor=\"#FFFFFF\";\n"+
		"}\n"+
		"</script>\n"+
		"<table class=\"clsOTable\" cellspacing=\"0\" border=\"0\" width=\"100%\">\n"+
		"<tr><td bgcolor=\"#4682B4\">\n"+
		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
		"<tr>\n	<td bgcolor=\"#4682B4\"><a "+MOUSE+" name=\"hlink\" onclick=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_prev_month)+"');\">"+
		"<img src='prev.gif' width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"mese precedente\" title=\"mese precedente\"></a></td>\n"+
		"	<td align=\"center\" 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 "+MOUSE+" name=\"hlink\" onclick=\"javascript:window.opener.show_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+"');\">"+
		"<img src='next.gif' width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"mese successivo\" title=\"mese successivo\"></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 align=\"center\" 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++) {
			var ddx = new Date(dt_current_day.getFullYear(), dt_current_day.getMonth(), dt_current_day.getDate());
			var clicca="\"javascript:window.opener."+str_target+".value='"+dt2dtstr(dt_current_day)+"'; window.close();\"";

				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
						if (isfesta(ddx)) {
							str_buffer += "	<td onclick="+clicca+" bgcolor=\"red\" align=\"right\">";
						}
						else{
							str_buffer += "	<td onclick="+clicca+" bgcolor=\"#DBEAF5\" align=\"right\">";
						}
					}
					else{
						// print working days of current month
						if (isfesta(ddx)) {
							str_buffer += "	<td onclick="+clicca+" bgcolor=\"red\" align=\"right\">";
						}
						else{
							str_buffer += "	<td onclick="+clicca+" bgcolor=\"white\" align=\"right\">";
						}
					}
				}
				if (dt_current_day.getMonth() == dt_datetime.getMonth())
					// print days of current month
					str_buffer += "<a "+MOUSE+" name=\"hlink\" onclick="+clicca+">"+
					"<font color=\"black\" face=\"tahoma, verdana\" size=\"2\">";
				else
					// print days of other months
					str_buffer += "<a "+MOUSE+" name=\"hlink\" onclick="+clicca+">"+
					"<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 +=
		"<form name=\"cal\">\n<tr><td colspan=\"7\" bgcolor=\"#87CEFA\">"+
		"<font color=\"White\" face=\"tahoma, verdana\" size=\"2\">"+
		"</font></td></tr>\n</form>\n" +
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"</body>\n" +
		"</html>\n";

	var wind=window.open("../null.php","Calendar","width=270,height=260,status=no,resizable=no,top="+g_y+",left="+g_x);
	wind.focus();
	var vWinCal = window.open("","Calendar",
		"width=270,height=260,status=no,resizable=no,top="+g_y+",left="+g_x);
	vWinCal.opener = self;
	var calc_doc = vWinCal.document;
	calc_doc.write (str_buffer);
	//calc_doc.focus();
	calc_doc.close();
}
// datetime parsing and formatting routimes. modify them if you wish other datetime format
function str2dt (str_datetime) {
	var re_date = /^(\d+)\/(\d+)\/(\d+)/;
	if (!re_date.exec(str_datetime))
		return alert("Formato data non valido: "+ str_datetime);
	return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1, RegExp.$4, RegExp.$5, RegExp.$6));
}
function dt2dtstr (dt_datetime) {
	return (new String (
			(dt_datetime.getDate() < 10 ? "0" : "") + dt_datetime.getDate() + "/" +
			(dt_datetime.getMonth() < 9 ? "0" : "") + (dt_datetime.getMonth()+1) + "/" +
			dt_datetime.getFullYear()));
}

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;
}

