/*
Project Manager Dexea
Copyright (C) 2006 dexea G.m.b.H  info@dexea.it

This file is part of Project Manager Dexea.

Project Manager Dexea is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or any later version.

Project Manager Dexea is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Nome-Programma; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
function getArrayMonth (_language) {
  var arr_months;
  if (_language == 'de')
    arr_months = ["Jänner", "Februar", "März", "April", "Mai", "Juni",
   		"Juli", "August", "September", "Oktober", "November", "Dezember"];
  else
   arr_months = ["Gennaio", "Febbraio", "Marzo", "Aprile", "Maggio", "Giugno",
   		"Luglio", "Agosto", "Settembre", "Ottobre", "Novembre", "Dicembre"];

  return arr_months;
}

function getArrayDays (_language) {
  var arr_days;
  if (_language == 'de')
    arr_months = ["Son", "Mon", "Die", "Mit", "Don", "Fre", "Sam"];
  else
   arr_months = ["Dom", "Lun", "Mar", "Mer", "Gio", "Ven", "Sab"];

  return arr_months;
}

function show_calendar(_itemDay, _itemMonth, _itemYear, str_datetime, language) {
	var arr_months = getArrayMonth(language);
	var week_days = getArrayDays(language);
	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 str_buffer = new String (
		"<html>\n"+
		"<head>\n"+
		"	<title>Calendar</title>\n"+
		"</head>\n"+
		"<body bgcolor=\"White\">\n"+
		"<table class=\"clsOTable\" cellspacing=\"0\" border=\"0\" width=\"100%\">\n"+
		"<tr><td bgcolor=\"#ff9200\">\n"+
		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
		"<tr>\n	<td bgcolor=\"#ff9200\"><a href=\"javascript:window.opener.show_calendar('"+
		_itemDay + "','" + _itemMonth + "','" + _itemYear +"', '"+ dt2dtstr(dt_prev_month)+"','" + language + "');\">"+
		"<img src=\"img_new/buttons/back_mouseover.gif\" width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"previous month\"></a></td>\n"+
		"	<td bgcolor=\"#ff9200\" colspan=\"5\">"+
		"<font color=\"white\" face=\"tahoma, verdana\" size=\"2\">"
		+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</font></td>\n"+
		"	<td bgcolor=\"#ff9200\" align=\"right\"><a href=\"javascript:window.opener.show_calendar('"+
		_itemDay + "','" + _itemMonth + "','" + _itemYear +"', '"+dt2dtstr(dt_next_month)+"','" + language + "');\">"+
		"<img src=\"img_new/buttons/forward_mouseover.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=\"#ffcc99\">"+
		"<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=\"#e9ece7\" 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
					str_buffer += "<a href=\"javascript:window.opener.document.getElementsByName('"+ _itemDay   +"')[0].value='"+dt2Day(dt_current_day) +"';" +
                                          "window.opener.document.getElementsByName('"+ _itemMonth +"')[0].value='" + dt2Month(dt_current_day) + "';" +
                                          "window.opener.document.getElementsByName('"+ _itemYear  +"')[0].value='" + dt2Year(dt_current_day) + "';" +
                                          "window.close(); \">"+
					  "<font color=\"black\" face=\"tahoma, verdana\" size=\"2\">";
				else
					// print days of other months
					str_buffer += "<a href=\"javascript:window.opener.document.getElementsByName('"+ _itemDay   +"')[0].value='"+dt2Day(dt_current_day) +"';" +
                                          "window.opener.document.getElementsByName('"+ _itemMonth +"')[0].value='" + dt2Month(dt_current_day) + "';" +
                                          "window.opener.document.getElementsByName('"+ _itemYear  +"')[0].value='" + dt2Year(dt_current_day) + "';" +
                                          "window.close(); \">"+
					  "<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" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendario",
		"width=280,height=215,status=no,resizable=no,top=200,left=200");
	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+)+$/;
	if (!re_date.exec(str_datetime))
		return new Date();
	return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1 ));
}
function dt2dtstr (dt_datetime) {
	return (new String (
			dt_datetime.getDate() + "." + (dt_datetime.getMonth()+1)+"."+dt_datetime.getFullYear()));
}

function dt2Day (dt_datetime) {
  return (new String (dt_datetime.getDate()));
}

function dt2Month (dt_datetime) {
  return (new String (dt_datetime.getMonth() + 1));
}

function dt2Year (dt_datetime) {
  return (new String (dt_datetime.getFullYear()));
}

