// 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

var path ="../js/datepicker/";

function show_calendar(str_target, str_datetime, time_flag) {
	str_target2 = unescape(str_target);
	str_target = escape(str_target2); // sieht schwachsinnig aus, der IE braucht's aber
	if (str_datetime=="")
	{
		eval("str_datetime="+str_target2+".value;");
	}
	if (!time_flag)
	{
		//time_flag = false;
		str_datetime+= " 00:00:00";
	}

	var arr_months = ["Januar", "Februar", "März", "April", "Mai", "Juni",
		"Juli", "August", "September", "Oktober", "November", "Dezember"];
	var week_days = ["So", "Mo", "Di", "Mi", "Do", "Fr", "Sa"];
	var n_weekstart = 1; // day week starts from (normally 0 or 1)

	var dt_datetime = (
		( str_datetime == null || str_datetime =="" || str_datetime=="0000-00-00 00:00:00" )
		?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"+
		"<script language=\"javascript\">\n"+
		"var ele = window.opener."+str_target2+"\n"+
		"</script>\n"+
		"</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,time_flag)+"'"+
		(time_flag?"+' '+document.cal.time.value,true":",false")+");\">"+
		"<img src=\""+path+"prev.gif\" width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"previous month\"></a></td>\n"+
		"	<td 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 href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_next_month,time_flag)+"'"+
		(time_flag?"+' '+document.cal.time.value,true":",false")+");\">"+
		"<img src=\""+path+"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=\"#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\" align=\"right\">";
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
					// weekend days
					str_buffer += "	<td bgcolor=\"#DBEAF5\" 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:ele"+
					".value='"+dt2dtstr(dt_current_day)+"'"+
					(time_flag?"+dt2tmstr(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:ele"+
					".value='"+dt2dtstr(dt_current_day)+"'"+
					(time_flag?"+dt2tmstr(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
//	if (time_flag)
	{
		str_buffer +=
			"<form name=\"cal\" onSubmit=\"window.close()\">\n<tr><td colspan=\"7\" bgcolor=\"#87CEFA\">"+
			"<font color=\"White\" face=\"tahoma, verdana\" size=\"2\">"+
			"Time: <input type=\"text\" name=\"time\" value=\""+dt2tmstr(dt_datetime)+
			"\" size=\"8\" maxlength=\"8\"></font></td></tr>\n</form>\n";
	}
	str_buffer +=
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"<script language=\"javascript\">"+
		"function dt2tmstr (dt_datetime) {\n" +
		"if (dt_datetime.substr(0,1)==\" \") dt_datetime=substr(1,dt_datetime.length-1);\n" +
		"dt = dt_datetime.split(\":\")\n" +
		"newHours = dt[0];\n" +
		"if (newHours.length < 2)\n" +
		"	newHours = \"0\" + newHours;\n" +
		"newMinutes = dt[1];\n" +
		"if (newMinutes.length < 2)\n" +
		"	newMinutes = \"0\" + newMinutes;\n" +
		"newSeconds = dt[2];\n" +
		"if (newSeconds.length < 2)\n" +
		"	newSeconds = \"0\" + newSeconds;\n" +
		"return (new String (\" \"+newHours+\":\"+newMinutes+\":\"+newSeconds));\n" +
		"}\n" +
		"</script>\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();
	vWinCal.focus();
}
// 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+)$/;
	if (!re_date.exec(str_datetime))
		return (new Date()) // alert("Invalid Datetime format: "+ str_datetime);
	return (new Date (RegExp.$1, RegExp.$2-1, RegExp.$3, RegExp.$4, RegExp.$5, RegExp.$6));
}

function dt2dtstr (dt_datetime,time_flag)
{
	// Führende Nullen einfügen bei einstelligen Ziffern
	// Sonst ist keine einheitliche Sortierung der Einträge möglich
	newMonth = new String((dt_datetime.getMonth()+1));
	if (newMonth.length < 2)
		newMonth = "0" + newMonth;

	newDate = new String(dt_datetime.getDate());
	if (newDate.length < 2)
		newDate = "0" + newDate;

	return (new String (dt_datetime.getFullYear()+"-"+newMonth+"-"+newDate));
}

function dt2tmstr (dt_datetime)
{
	// Führende Nullen einfügen bei einstelligen Ziffern
	// Sonst ist keine einheitliche Sortierung der Einträge möglich
	newHours = new String(dt_datetime.getHours());
	if (newHours.length < 2)
		newHours = "0" + newHours;

	newMinutes = new String(dt_datetime.getMinutes());
	if (newMinutes.length < 2)
		newMinutes = "0" + newMinutes;

	newSeconds = new String(dt_datetime.getSeconds());
	if (newSeconds.length < 2)
		newSeconds = "0" + newSeconds;

	return (new String (newHours+":"+newMinutes+":"+newSeconds));
}
