// Title: Timestamp picker
// Description: See the demo at url
// URL: http://www.softcomplex.com/products/tigra_calendar/
// Version: 1.0.a (Date selector only)
// Date: 12-12-2001 (mm-dd-yyyy)
// Author: Denis Gritcyuk <denis@softcomplex.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_calendar2(str_target, str_datetime, myclientX, myclientY) {
	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 = 1; // day week starts from (normally 0 or 1)

	var dt_datetime = (str_datetime == null || str_datetime =="" ?  new Date() : str2dt2(str_datetime));
	var dt_prev_month = new Date(dt_datetime);
	dt_prev_month.setMonth(dt_datetime.getMonth()-1);
	if (dt_datetime.getMonth()%12 != (dt_prev_month.getMonth()+1)%12) {
		dt_prev_month.setMonth(dt_datetime.getMonth());
		dt_prev_month.setDate(0);
	}
	var dt_next_month = new Date(dt_datetime);
	dt_next_month.setMonth(dt_datetime.getMonth()+1);
	if ((dt_datetime.getMonth() + 1)%12 != dt_next_month.getMonth()%12)
		dt_next_month.setDate(0);
	
	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>iPlan Calendar</title>\n"+
		"	<link rel=\"STYLESHEET\" type=\"text/css\" href=\"laplanning.css\">\n"+
		"</head>\n"+
		"<body bgcolor=\"lightyellow\">\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_calendar2('"+
		str_target+"', '"+ dt2dtstr2(dt_prev_month)+"');\">"+
		"<img src=\"../images/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_calendar2('"
		+str_target+"', '"+dt2dtstr2(dt_next_month)+"');\">"+
		"<img src=\"../images/next.gif\" width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"next month\"></a></td>\n</tr>\n"
	);

	//'alert("eval is : " + eval(str_target+".disabled"));

	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=\"#00C000\" 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\">";
	
	
				//' Check if the source control is disabled.
				
				if ( eval(str_target+".disabled") == true )
				{
					// print days of current month not with no links on the numbers
					str_buffer += "<font color=\"black\" face=\"tahoma, verdana\" size=\"2\">";
				}
				else
				{
					if (dt_current_day.getMonth() == dt_datetime.getMonth())
						// print days of current month
						str_buffer += "<a href=\"javascript:window.opener."+str_target+
						".value='"+dt2dtstr2(dt_current_day)+"';window.close();window.opener."+str_target+".focus();\">"+
						"<font color=\"black\" face=\"tahoma, verdana\" size=\"2\">";
					else 
						// print days of other months
						str_buffer += "<a href=\"javascript:window.opener."+str_target+
						".value='"+dt2dtstr2(dt_current_day)+"';window.close();window.opener."+str_target+".focus();\">"+
						"<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 +=
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"<center><a href=\"javaScript:window.close();\">Close Calendar</a><center></body>\n" +
		"</html>\n";

	

	var vWinCal = window.open("", "Calendar", 
		"width=200,height=230,status=no,resizable=no,toolbar=no,menubar=no,location=no,top=" + myclientY + ",left=" +  myclientX );
	vWinCal.opener = self;
	vWinCal.focus();
	var calc_doc = vWinCal.document;
	calc_doc.write (str_buffer);
	calc_doc.close();
	
	str_target
}
// datetime parsing and formatting routimes. modify them if you wish other datetime format
function str2dt2 (str_datetime) 
{
	var regexp_year ;	
	var regexp_yearStr ;	
	
	var re_date = /^(\d+)\/(\d+)\/(\d+)$/;
	if (!re_date.exec(str_datetime))
		return alert("Invalid Datetime format: "+ str_datetime);
	
	//' CMF 30-5-02 See if the date is a 2 digit number? if so determine its prefix
	//' should it be 20?? or 19?? 
	regexp_year  = new Number(RegExp.$3) ;
	//'alert("year : " + regexp_year.toString() );
	if ( regexp_year < 50 )
		regexp_year = "20" + RegExp.$3 
	if ( regexp_year > 50 && regexp_year < 100 )
		regexp_year = "19" + RegExp.$3 
	
	return (new Date(regexp_year, RegExp.$2-1, RegExp.$1));
}
function dt2dtstr2 (dt_datetime) {
	return (new String (
			dt_datetime.getDate()+"/"+(dt_datetime.getMonth()+1)+"/"+dt_datetime.getFullYear()));
}



