// 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

// static lookup for public holidays
// where those holidays are the same
// each year
var january = new Array();
var february = new Array();
var march = new Array();
var april = new Array();
var may = new Array();
var june = new Array();
var july = new Array();
var august = new Array();
var september = new Array();
var october = new Array();
var november = new Array();
var december = new Array();


january["1"]   = 1;
january["26"]  = 1;
march["1"]  = 1;
april["2"]     = 1;
april["5"]     = 1;
april["26"]     = 1;
june["7"]      = 1;
september["27"] = 1;
december["25"] = 1;
december["26"] = 1;
december["28"] = 1;

var holidays = new Array(january, february, march, april, may, june, july, august, september, october, november, december);

function minimum(date1, date2) {

    eval("date1 = window.opener.document.forms.booking.arrival_date.value;");
    eval("date2 = window.opener.document.forms.booking.departure_date.value;");

    if (!date1) {
	return;
    }

    if (!date2) {
	return;
    }

    date1 = new Date(str2dt(date1));
    date2 = new Date(str2dt(date2));

    e1 = date1.getTime() / 1000;
    e2 = date2.getTime() / 1000;

    if (e1 >= e2) {
	alert('Return time cannot be earlier or the same as the collect time')
    }
    else if ((e2 - e1) < 60 * 60 * 24 * 7) {
	alert("Sorry, the minimum rental time is 7 days");
    }
    else {
	return;
    }
    
    window.opener.document.forms.booking.arrival_date.value='';
    window.opener.document.forms.booking.departure_date.value='';
    window.opener.document.getElementById('arrival_date_text').innerHTML='Choose a date';
    window.opener.document.getElementById('departure_date_text').innerHTML='Choose a date';
    window.close();

}

function show_calendar(str_target, str_label, str_datetime, str_otherdate) {

	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() : 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 type='text/javascript' src='javascript/ts_picker.js'></script>"+
		"<script type='text/javascript' src='javascript/cost.js'></script>"+
		"</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+"', '"+str_label+"', '"+ dt2dtstr(dt_prev_month)+"');\">"+
		"<img src=\"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+"', '"+str_label+"', '"+dt2dtstr(dt_next_month)+"');\">"+
		"<img src=\"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)
				else if (dt_current_day.getDay() == 0)
					// weekend days
					str_buffer += "	<td bgcolor=\"#DBEAF5\" align=\"right\">";
				else if (holidays[dt_current_day.getMonth()][dt_current_day.getDate()])
                                        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.getDay() == 0 || dt_current_day.getDay() == 6)
				if (dt_current_day.getDay() == 0)
					str_buffer += "<font color=\"black\" face=\"tahoma, verdana\" size=\"2\">";
				else if (holidays[dt_current_day.getMonth()][dt_current_day.getDate()])
					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='"+dt2dtstr(dt_current_day)+"'; window.opener.document.getElementById('"+str_label+
                                        "').innerHTML='"+dt2dtstr(dt_current_day)+"'; minimum(); updatePayable(window.opener); 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)+"'; window.opener.document.getElementById('"+str_label+
                                        "').innerHTML='"+dt2dtstr(dt_current_day)+"'; minimum(); updatePayable(window.opener); window.close();\">"+
					"<font color=\"gray\" face=\"tahoma, verdana\" size=\"2\">";
				
				//if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
				if (dt_current_day.getDay() == 0)
					str_buffer += dt_current_day.getDate()+"</font></td>\n";
				else
					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=\"#87CEFA\">"+
		"<font color=\"White\" face=\"tahoma, verdana\" size=\"2\">"+
		"</font></td></tr>\n</form>\n" +
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendar", 
		"width=210,height=225,modal=yes,menubar=no,scrollbars=no,titlebar=no,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("Invalid Datetime format: "+ 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()));
}

