// Title: Timestamp picker
// Description: See the demo at url
// URL: http://us.geocities.com/tspicker/
// Script featured on: http://javascriptkit.com/script/script2/timestamp.shtml
// 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) {
	var arr_months = ["Januar", "Februar", "Marts", "April", "Maj", "Juni",
		"Juli", "August", "September", "Oktober", "November", "December"];
	var week_days = ["Sø", "Ma", "Ti", "On", "To", "Fr", "Lø"];
	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>Vælg dato og tid &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</title>\n"+
		"	<style type=\"text/css\">\n"+
		"	body {background-image: url(gfx/bg.jpg); margin: 4px 0 0 0; text-align: center}\n"+
		"	.clsOTable {border: 0; font-family: tahoma, verdana; font-size: 11px;margin: 0 auto 0 auto}\n"+
		"	.innnertable {border: 0; font-family: tahoma, verdana; font-size: 11px;}\n"+
		"	td {height: 20px; line-height: 20px; padding: 0 0 0 3px; font-size: 11px;}\n"+
		"	td a:hover {color: #900000; font-weight: bold}\n"+
		"	.selMonthDates {text-decoration: none; color: #000000; display: block;}\n"+
		"	.othMonthDates {text-decoration: none; color: #909090; display: block;}\n"+
		"	.weekendDays {background-color: #e0e0e0; text-align: right; padding: 0 0 0 0; width: 26px;}\n"+
		"	.weekDays {background-color: #ffffff; text-align: right; padding: 0 0 0 0; width: 26px;}\n"+
		"	.currentDay {background-color: #ffa8a0; text-align: right; padding: 0 0 0 0; width: 26px;}\n"+
		"	input {font-family: tahoma, verdana; font-size: 11px;}\n"+
		"	</style>\n"+
		"</head>\n"+
		"<body>\n"+
//		"<table class=\"clsOTable\" cellspacing=\"0\">\n"+
//		"<tr><td style=\"background-color: #f0f0f0\">\n"+
		"<table class=\"innnertable\" cellspacing=\"1\">\n"+
		"<tr>\n	<td style=\"background-color: #808080; text-align: center; width: 26px;\"><a href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_prev_month)+"'+document.cal.time.value);\">"+
		"<img src=\"../img/date_picker_images/prev2.gif\" style=\"width: 16px; height: 16px; border: 0\""+
		" alt=\"forrige måned\"></a></td>\n"+
		"	<td style=\"background-color: #808080; text-align: center; width: 134px; color: #ffffff; font-weight: bold;\" colspan=\"5\">"
		+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</td>\n"+
//		+dt_datetime.getFullYear()+" "+arr_months[dt_datetime.getMonth()]+"</td>\n"+
		"	<td style=\"background-color: #808080; text-align: center; width: 26px;\"><a href=\"javascript:window.opener.show_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+"'+document.cal.time.value);\">"+
		"<img src=\"img/date_picker_images/next2.gif\" style=\"width: 16px; height: 16px; border: 0\""+
		" alt=\"næste måned\"></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 style=\"background-color: #900000; width: 26px; color: #ffffff\">"+
		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>\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 class=\"currentDay\">";
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
					// weekend days
					str_buffer += "	<td class=\"weekendDays\">";
				else
					// print working days of current month
					str_buffer += "	<td class=\"weekDays\">";

				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)+"'+document.cal.time.value; window.close();\" class=\"selMonthDates\">";
				else 
					// print days of other months
					str_buffer += "<a href=\"javascript:window.opener."+str_target+
					".value='"+dt2dtstr(dt_current_day)+"'+document.cal.time.value; window.close();\" class=\"othMonthDates\">";
				str_buffer += dt_current_day.getDate()+"&nbsp;</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\" style=\"width: 188px; background-color: #900000; color: #ffffff; line-height: 14px; padding-top: 1px;\">"+
//		"&nbsp;Tid: &nbsp;&nbsp;<input type=\"text\" name=\"time\" value=\""+dt2tmstr(dt_datetime)+
//		"\" style=\"width: 60px; font-size: 10px; padding-left: 5px; line-height: 14px; height: 16px; border: 0;\" maxlength=\"8\"></td></tr>\n</form>\n" +
		"<form name=\"cal\">\n<tr><td colspan=\"7\" style=\"width: 188px; background-color: #900000; color: #ffffff; line-height: 14px; padding-top: 1px;\">"+
		"<input type=\"text\" name=\"time\" value=\""+dt2tmstr(dt_datetime)+
		"\" style=\"display: none; width: 60px; font-size: 10px; padding-left: 5px; line-height: 14px; height: 16px; border: 0;\" maxlength=\"8\"></td></tr>\n</form>\n" +
		"</table>\n" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendar", 
		"width=240,height=200,menubar=no,toolbar=no,resizable=no,status=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+)\s+(\d+)\:(\d+)\:(\d+)$/; // fuld dato
	var re_date = /^(\d+)\-(\d+)\-(\d+)/; // uden tid
//	var re_date = /^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)/; // uden sekunder
	if (!re_date.exec(str_datetime))
		return alert("Invalid Datetime format: "+ str_datetime);
//	return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1, RegExp.$4, RegExp.$5, RegExp.$6));
	return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1, RegExp.$4));
}

function dt2dtstr (dt_datetime) {

	// Add leading zeros to month and date if required (Frederik)
	// Get month and correct it (getMonth() returns 0 to 11)
	gMonth = (dt_datetime.getMonth()+1);
	if (gMonth < 10) gMonth = "0"+gMonth;

	gDate = (dt_datetime.getDate());
	if (gDate < 10) gDate = "0"+gDate;

	return (new String (
//			dt_datetime.getDate()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getFullYear()+" "));
//			dt_datetime.getFullYear()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getDate()+" "));
			gDate+"-"+gMonth+"-"+dt_datetime.getFullYear()+" "));
}
function dt2tmstr (dt_datetime) {

	gHours = (dt_datetime.getHours());
	if (gHours < 10) gHours = "0"+gHours;

	gMinutes = (dt_datetime.getMinutes());
	if (gMinutes < 10) gMinutes = "0"+gMinutes;

	return (new String (
//			dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
//			dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":00"));
//			gHours+":"+gMinutes+":00"));
//			gHours+":"+gMinutes));
			));
}

/*function dt2dtstr (dt_datetime) {
	return (new String (
			dt_datetime.getFullYear()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getDate()+" "));
}
function dt2tmstr (dt_datetime) {
	return (new String (
			dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}*/

