// 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 cal_registered = new Array();

var JCAL_arr_months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
var JCAL_week_days = ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"];
var JCAL_Close = "Close";

function JCAL_doSetLang(months,wdays,close){

	JCAL_arr_months = months;
	JCAL_week_days = wdays;
	JCAL_Close = close;

}


function doSetDate(target,data){
	if (data!=''){
	var el=document.getElementById(target);
	el.value=data;
	}
	toggleBox("div_calendar_"+target,0);
}

function show_calendar(target, str_datetime, root) {

	var found = false;
	for (var i=0;i<cal_registered.length;i++){
		toggleBox('div_calendar_'+cal_registered[i],0);
		if (cal_registered[i]==target){
			found=true;
		}
	}
	if (!found)	{ cal_registered.push(target); }

	toggleBox('div_calendar_'+target,1);

	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 (
		"<table cellspacing=\"0\" border=\"0\" width=\"200\">\n"+
		"<tr><td bgcolor=\"#4682B4\">\n"+
		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
		"<tr>\n	<td bgcolor=\"#4682B4\"><a href=\"javascript:show_calendar('"+target+"', '"+ dt2dtstr(dt_prev_month)+"','"+root+"');\">"+		
		"<img src=\""+root+"js_calendar/prev.gif\" width=\"16\" height=\"16\" border=\"0\""+
		" alt=\"previous month\"></a></td>\n"+
		"	<td bgcolor=\"#4682B4\" colspan=\"5\" align=\"center\">"+
		"<span class=\"CalcTit\">"
		+JCAL_arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</font></td>\n"+
		"	<td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:show_calendar('"+target+"', '"+dt2dtstr(dt_next_month)+"','"+root+"');\">"+
		"<img src=\""+root+"js_calendar/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\">"+
		"<span class=\"CalcWeek\">"+
		JCAL_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 class=\"CalcNum\" href=\"javascript:doSetDate('"+target+
					"','"+dt2dtstr(dt_current_day)+"');\">"+"";
				else 
					// print days of other months
					str_buffer += "<a class=\"CalcNumG\" href=\"javascript:doSetDate('"+target+
					"','"+dt2dtstr(dt_current_day)+"');\">"+"";
				//if (dt_current_day.getDate()<10){
				//	str_buffer +="0";
				//}
				str_buffer += dt_current_day.getDate()+"</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";
	str_buffer += "</td></tr>\n";
	str_buffer += "<tr><td bgcolor=\"#4682B4\" align=\"right\" style=\"padding-right:6px; padding-bottom:4px;\">\n";
	str_buffer += "<table cellspacing=\"0\" cellpadding=\"0\" border=\"0\"><tr><td style=\"padding-right:4px;\"><a class=\"CalcClose\" href=\"javascript:doSetDate('"+target+"','');\">"+JCAL_Close+"</a></td><td><a href=\"javascript:doSetDate('"+target+"','');\"><img src=\""+root+"js_calendar/close.gif\" width=\"16\" height=\"16\" border=\"0\" alt=\"close\"></a></td></tr></table>\n";
	str_buffer += "</td></tr>\n";
	str_buffer += "</table>\n"+"\n";


	var el = document.getElementById("div_calendar_"+target);
	el.innerHTML=str_buffer;
}
// 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("Data non valida: "+ str_datetime);
	return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1, RegExp.$4, RegExp.$5, RegExp.$6));
}
function dt2dtstr (dt_datetime) {
	var dd = dt_datetime.getDate();
	var mm = (dt_datetime.getMonth()+1);
	var yyyy = dt_datetime.getFullYear();

	if (dd<10){
		dd = "0"+dd;
	}
	if (mm<10){
		mm = "0"+mm;
	}
	return (new String (
			dd+"/"+mm+"/"+yyyy));
}
function dt2tmstr (dt_datetime) {
	return (new String (
			dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}