// 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", "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 =="" ?  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>Kalender</title>\n"+

		"</head>\n"+

		"<body bgcolor=\"#c6b5a2\">\n"+

		"<table class=\"clsOTable\" cellspacing=\"0\" border=\"0\" width=\"100%\">\n"+

		"<tr><td bgcolor=\"#e33534\">\n"+

		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+

		"<tr>\n	<td bgcolor=\"#e33534\"><a href=\"javascript:window.opener.show_calendar('"+

		str_target+"', '"+ dt2dtstr(dt_prev_month)+"'+document.cal.time.value);\">"+

		"<img src=\"images/cal_prev.gif\" width=\"16\" height=\"16\" border=\"0\""+

		" alt=\"previous month\"></a></td>\n"+

		"	<td bgcolor=\"#e33534\" colspan=\"5\">"+

		"<font color=\"white\" face=\"tahoma, verdana\" size=\"2\">"

		+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</font></td>\n"+

		"	<td bgcolor=\"#e33534\" align=\"right\"><a href=\"javascript:window.opener.show_calendar('"

		+str_target+"', '"+dt2dtstr(dt_next_month)+"'+document.cal.time.value);\">"+

		"<img src=\"images/cal_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=\"#f07474\">"+

		"<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=\"#f4ece9\" 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."+str_target+

					".value='"+dt2dtstr(dt_current_day)+"'+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)+"'+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=\"#f07474\">"+

		"<font color=\"White\" face=\"tahoma, verdana\" size=\"2\">"+

		"<input type=\"hidden\" name=\"time\" value=\""+

		"\" size=\"8\" maxlength=\"8\"></font></td></tr>\n</form>\n" +

		"</table>\n" +

		"</tr>\n</td>\n</table>\n" +

		"</body>\n" +

		"</html>\n";



	var vWinCal = window.open("", "Calendar", 

		"width=200,height=200,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+)$/;

	if (!re_date.exec(str_datetime))

		return alert("Ungültiges Datumsformat: "+ 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()));

}




