// Detect if the browser is IE or not.
// If it is not IE, we assume that the browser is NS.
var IE = document.all?true:false

// If NS -- that is, !IE -- then set up for mouse capture
if (!IE) document.captureEvents(Event.MOUSEMOVE)

// Set-up to use getMouseXY function onMouseMove
document.onmousemove = getMouseXY;

// Temporary variables to hold mouse x-y pos.s
var tempX = 0
var tempY = 0

// Main function to retrieve mouse x-y pos.s

function getMouseXY(e) {
  if (IE) { // grab the x-y pos.s if browser is IE
    tempX = event.clientX   // + document.body.scrollLeft
    tempY = event.clientY  // + document.body.scrollTop
  } else {  // grab the x-y pos.s if browser is NS
    tempX = e.clientX
    tempY = e.clientY
  }
  // catch possible negative values in NS4
  if (tempX < 0){tempX = 0}
  if (tempY < 0){tempY = 0}
  return true
}

function fest(giorno, mese) {
for (var i=1; giorni_fest[i] != 0 ; i++)
    {
	    if (giorni_fest[i] == giorno && mesi_fest[i] == mese) return true;
     }
return false;
}

function controlla_fest(str_datetime) {

var dt_datetime = str2dt(str_datetime);


if (dt_datetime.getDay() == 0 || dt_datetime.getDay() == 6) return true;

return fest(dt_datetime.getDate(), dt_datetime.getMonth()+1);
}

function show_calendar(str_target, str_datetime) {
	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); //  Con questo si abilita il tasto indietro
	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 str_buffer = new String (
		"<html>\n"+
		"<head>\n"+
		"	<title>Calendario</title>\n"+
        "<link href='css/FdS.css' rel='stylesheet' type='text/css'>" +
		"</head>\n"+
		"<body bgcolor=\"White\">\n"+
		"<table class=\"clsOTable\" cellspacing=\"0\" border=\"0\" width=\"100%\">\n"+
		"<tr><td bgcolor=\"#FFBC0D\">\n"+
		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
		"<tr>\n	<td bgcolor=\"#FFBC0D\"><a href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_prev_month)+"');\">"+
		"<img src=\"images/prev.gif\" width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"previous month\"></a></td>\n"+
		"	<td bgcolor=\"#FFBC0D\" colspan=\"5\" class = 'testo'>"+
		arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+  "</td>\n"+
		"	<td bgcolor=\"#FFBC0D\" align=\"right\"><a href=\"javascript:window.opener.show_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+"');\">"+
		"<img src=\"images/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=\"#FFFBBA\" class='testo'>" +
		week_days[(n_weekstart+n)%7]+  "</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 class='testo'>\n";
		for (var n_current_wday=0; n_current_wday<7; n_current_wday++) {
				// alert(dt_current_day.getDate());
				/// alert(dt_current_day.getMonth());
				if (dt_current_day.getDate() == dt_datetime.getDate() &&
					dt_current_day.getMonth() == dt_datetime.getMonth())
					// print current date
					str_buffer += "	<td bgcolor=\"#B7C0D1\" align=\"right\">";
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6 || fest(dt_current_day.getDate(), dt_current_day.getMonth()+1))
					// weekend days
					str_buffer += "	<td bgcolor=\"#FFBC0D\" 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
				    if (!(dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6 || fest(dt_current_day.getDate(), dt_current_day.getMonth()+1)))
						str_buffer += "<a href=\"javascript:window.opener."+str_target+
						".value='"+dt2dtstr(dt_current_day)+ "'; window.close();\">"; // "'+document.cal.time.value; window.close();\">";
         		}
				else
				{
					// print days of other months
				    if (!(dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6 || fest(dt_current_day.getDate(), dt_current_day.getMonth()+1)))
						str_buffer += "<a href=\"javascript:window.opener."+str_target+
						".value='"+dt2dtstr(dt_current_day)+"'; window.close();\">"; // "'+document.cal.time.value; window.close();\">";
         		}
				str_buffer += dt_current_day.getDate()+"</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=\"#FFFBBA\">"+
		"&nbsp &nbsp <input type=\"hidden\" name=\"time\" value=\""+dt2tmstr(dt_datetime)+
		"\" size=\"8\" maxlength=\"8\"></td></tr>\n</form>\n" +
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendar",
		"width=178,height=189,status=no,resizable=no,caption=no,top=" + (tempY-30) + ",left=" + (tempX+30));
	vWinCal.opener = self;
	var calc_doc = vWinCal.document;
	calc_doc.write (str_buffer);
	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+)\s+(\d+)\:(\d+)\:(\d+)$/;
	var re_date = /^(\d+)\/(\d+)\/(\d+)$/;
	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()+"/"+(dt_datetime.getMonth()+1)+"/"+dt_datetime.getFullYear()));
}
function dt2tmstr (dt_datetime) {
	return (new String (
			dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}

