// Title: Timestamp picker
// Description: See the demo at url
// URL: http://us.geocities.com/tspicker/
// Version: 1.0
// Date: 12-05-2001 (mm-dd-yyyy)
// Author: Denis Gritcyuk <denis@softcomplex.com>; <tspicker@yahoo.com>
// Notes: Permission given to use this script in any kind of applications if
//    header lines are left unchanged. Feel free to contact the author
//    for feature requests and/or donations

function show_calendar(str_target, str_datetime, date_only) {
	var arr_months = ["január", "február", "március", "április", "május", "június",
		"július", "augusztus", "szeptember", "október", "november", "december"];
	var week_days = ["V", "H", "K", "Sze", "Cs", "P", "Szo"];
	var n_weekstart = 1; // day week starts from (normally 0 or 1)

	var sep = " ";
	if (date_only == 1) { var sep = "" }
	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>Naptár</title>\n"+
		"<style type=\"text/css\">"+
		"a { text-decoration: none; }"+
		"a:hover { text-decoration: underline; }"+
		"</style>"+
		"</head>\n"+
		"<body bgcolor=\"White\">\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 href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_prev_month)+sep+"'+document.cal.time.value, "+date_only+");\">"+
		"<img src=\"__images__/cal_prev.gif\" width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"előző hónap\"></a></td>\n"+
		"	<td bgcolor=\"#4682B4\" colspan=\"5\">"+
		"<font color=\"white\" face=\"tahoma, verdana\" size=\"2\">"
		+dt_datetime.getFullYear()+". "+arr_months[dt_datetime.getMonth()]+"</font></td>\n"+
		"	<td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:window.opener.show_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+sep+"'+document.cal.time.value, "+date_only+");\">"+
		"<img src=\"__images__/cal_next.gif\" width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"következő hónap\"></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=\"#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++) {
				if (dt_current_day.getDate() == dt_datetime.getDate() &&
					dt_current_day.getMonth() == dt_datetime.getMonth())
					// print current date
					str_buffer += "	<td bgcolor=\"#FFB6C1\" onmouseout=\"bgColor='#FFB6C1'\" onmouseover=\"bgColor='#87CEFB'\" align=\"right\">";
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
					// weekend days
					str_buffer += "	<td bgcolor=\"#DBEAF5\" onmouseout=\"bgColor='#DBEAF5'\" onmouseover=\"bgColor='#87CEFB'\" align=\"right\">";
				else
					// print working days of current month
					str_buffer += "	<td bgcolor=\"white\" onmouseout=\"bgColor='white'\" onmouseover=\"bgColor='#87CEFB'\" align=\"right\">";

				if (dt_current_day.getMonth() == dt_datetime.getMonth())
					// print days of current month
					str_buffer += "<a href=\"javascript:window.opener."+str_target+
					".value='"+dt2dtstr(dt_current_day)+sep+"'+document.cal.time.value; window.close();\">"+
					"<font color=\"black\" face=\"tahoma, verdana\" size=\"2\">";
				else 
					// print days of other months
					str_buffer += "<a href=\"javascript:window.opener."+str_target+
					".value='"+dt2dtstr(dt_current_day)+sep+"'+document.cal.time.value; 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 +=
		"<form name=\"cal\">\n<tr><td colspan=\"7\" bgcolor=\"#87CEFA\">";
	if (date_only == 1)
		{
		str_buffer +=
			"<input type=\"hidden\" name=\"time\" value=\"\">";
		}
		else
		{
		str_buffer +=
			"<font color=\"White\" face=\"tahoma, verdana\" size=\"2\">"+
			"Idő: <input type=\"text\" name=\"time\" value=\""+dt2tmstr(dt_datetime)+
			"\" size=\"5\" maxlength=\"5\"></font>\n";
		}
	str_buffer +=
		"</td></tr>\n</form>"+
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendar", 
		"width=200,height=250,status=no,resizable=yes,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+)\s+(\d+)\:(\d+)$/;
	var re_date2 = /^(\d+)\-(\d+)\-(\d+)$/;
	if (!re_date.exec(str_datetime) && !re_date2.exec(str_datetime))
		return alert("Érvénytelen formátum: "+ str_datetime);
	return (new Date (RegExp.$1, RegExp.$2-1, RegExp.$3, RegExp.$4, RegExp.$5));
}
function dt2dtstr (dt_datetime) {
	var mnull = "";
	var dnull = "";
	if (dt_datetime.getMonth()<9) { var mnull = "0" }
	if (dt_datetime.getDate()<10) { var dnull = "0" }
	return (new String (
			dt_datetime.getFullYear()+"-"+mnull+(dt_datetime.getMonth()+1)+"-"+dnull+dt_datetime.getDate()));
}
function dt2tmstr (dt_datetime) {
	var hnull = "";
	var m2null = "";
	if (dt_datetime.getHours()<10) { var hnull = "0" }
	if (dt_datetime.getMinutes()<10) { var m2null = "0" }
	return (new String (
			hnull+dt_datetime.getHours()+":"+m2null+dt_datetime.getMinutes()));
}

