// 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, holidays) {
	var arr_months = ["January", "February", "March", "April", "May", "June",
		"July", "August", "September", "October", "November", "December"];
	var week_days = ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"];
	var n_weekstart = 0; // day week starts from (normally 0 or 1)
	
	if(holidays==null) var holidays=new Array();
	if(typeof holidays=="string") holidays=holidays.split(",");
	var holidayMap=new Object();
	for(var i=0;i<holidays.length;i++) {
		if(holidays[i]!=null) {
			holidayMap[holidays[i]]=i;
		}
	}
	//var count=0;
	for(var i in holidayMap) {
		//count++;
		//if(count==1) alert(i);	
	}

	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"+
      "   <style type=\"text/css\">\n"+
      "      body, table, td, th, p, div, span {color: #CCCCCC;font-family: Arial, Verdana, Monaco;font-size: 11px;}\n"+
      "      body{background:#ffffff;}\n"+
      "      .outer{background:#ffffff;}\n"+
      "      .month{background:#EFEFE7;color:#003063;font-weight:bold;}\n"+
      "      .dayHeader{background:#D6D7CE;color:#003063;font-weight:bold;}\n"+
      "      .calDays{background:#EFEFE7;}\n"+
      "      .weekend{color: #D6D7CE;font-weight:bold;}\n"+
      "     a{outline: none; text-decoration:none;}\n"+
      "     a:link {color: #636563;font-weight:bold;}\n"+
      "     a:visited {color: #636563;font-weight:bold;}\n"+
      "     a:hover {color: #003063;font-weight:bold;}\n"+
      "   </style>"+
		"</head>\n"+
		"<body>\n"+
		"<table class=\"clsOTable\" cellspacing=\"0\" border=\"0\" width=\"100%\">\n"+
		"<tr><td class=\"outer\">\n"+
		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
		"   <tr>\n"+
      "      <td colspan=\"7\" align=\"center\" class=\"month\"><a href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_prev_month)+"' ,'"+holidays+"');\">"+
      "<img src=\"/ecity/images/arrows2_003366_left.png\" width=\"8\" height=\"5\" border=\"0\""+
		" alt=\"previous month\"></a>&nbsp;&nbsp;"
		+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+
		"&nbsp;&nbsp;<a href=\"javascript:window.opener.show_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+"' ,'"+holidays+"');\">"+
      "<img src=\"/ecity/images/arrows2_003366_right.png\" width=\"8\" height=\"5\" 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 align=\"center\" class=\"dayHeader\">"+
		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 header
		str_buffer += "   <tr class=\"calDays\">\n";
		for (var n_current_wday=0; n_current_wday<7; n_current_wday++) {
			if (dt_current_day.getMonth() == dt_datetime.getMonth())
	       		// print days of current month
				if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6 ||
					holidayMap[dt2dtstr(dt_current_day)]!=null) {
					// print weekend of current month
					str_buffer += "      <td align=\"center\" class=\"weekend\">";
					str_buffer += dt_current_day.getDate();
	       			str_buffer += "</td>\n";
	       			//alert(dt2dtstr(dt_current_day)); //2003/10/04
	    			}
				else {
					// print working days of current month
					str_buffer += "      <td align=\"center\">";
					str_buffer += "<a href=\"javascript:window.opener."+str_target+
					".value='"+dt2dtstr(dt_current_day)+"'; window.close();\">";
					str_buffer += dt_current_day.getDate();
	       			str_buffer += "</a></td>\n";
	    			}
			else
				// print days of other months
				str_buffer += "      <td align=\"center\">&nbsp;</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("", "Calendar", 
		"width=200,height=190,status=no,resizable=yes,top=300,left=300");
	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+)$/;
	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.$6));
}
*/
function str2dt (str_datetime) {
	var re_date = /^(\d{4})\/(\d{2})\/(\d{2})$/;
	if (!re_date.exec(str_datetime))
		return alert("Invalid Datetime format: "+ str_datetime);
	return (new Date (RegExp.$1, RegExp.$2-1, RegExp.$3));
}
/*
function dt2dtstr (dt_datetime) {
	return (new String (
			dt_datetime.getDate()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getFullYear()+" "));
}
*/
// YYYY/MM/DD
function dt2dtstr (dt_datetime) {
	var twoDigitMonth;
	if(dt_datetime.getMonth()+1<10) twoDigitMonth="0"+(dt_datetime.getMonth()+1).toString();
	else twoDigitMonth=(dt_datetime.getMonth()+1).toString();
	
	var twoDigitDay;
	if(dt_datetime.getDate()<10) twoDigitDay="0"+(dt_datetime.getDate()).toString();
	else twoDigitDay=(dt_datetime.getDate()).toString();
	
	return (new String (
			dt_datetime.getFullYear()+"/"+twoDigitMonth+"/"+twoDigitDay));
}
function dt2tmstr (dt_datetime) {
	return (new String (
			dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}