// 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 = ["Enero", "Febrero", "Marzo", "Abril", "Mayo", "Junio",
		"Julio", "Agosto", "Septiembre", "Octubre", "Noviembre", "Diciembre"];
	var week_days = ["Do", "Lu", "Ma", "Mi", "Ju", "Vi", "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>Calendario</title>\n"+
		"</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+"', '"+ dt2dtstr(dt_prev_month)+"');\">"+
		"<img src=\"../imagenes/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+"', '"+dt2dtstr(dt_next_month)+"');\">"+
		"<img src=\"../imagenes/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)
					// 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 href=\"javascript:window.opener."+str_target+
					".value='"+dt2dtstr(dt_current_day)+"'; 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.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=\"#87CEFA\">&nbsp;"+
		"<input type=\"hidden\" name=\"time\" value=\""+ dt2dtstr(dt_datetime)+
		"\"></td></tr>\n</form>\n" +
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendar",
		"width=180,height=210,status=no,resizable=no,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("Formato No Válido de Fecha : "+ str_datetime);
	return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1, RegExp.$4, RegExp.$5, RegExp.$6));
}
function dt2dtstr (dt_datetime)
{
  var dia = dt_datetime.getDate();
  var strDia = "";
  if ( dia < 10 )
    strDia = "0";
  var mes = dt_datetime.getMonth() + 1;
  var strMes = "";
  if ( mes < 10 )
    strMes = "0";
	return (new String ( strDia + dia + "/" + strMes + mes + "/" + dt_datetime.getFullYear()));
}
function dt2tmstr (dt_datetime)
{
	return (new String ( dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}

function show_calendar1(str_target, str_datetime)
{
  var arr_months = ["Enero", "Febrero", "Marzo", "Abril", "Mayo", "Junio",
    "Julio", "Agosto", "Septiembre", "Octubre", "Noviembre", "Diciembre"];
  var week_days = ["Do", "Lu", "Ma", "Mi", "Ju", "Vi", "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>Calendario</title>\n"+
    "</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_calendar1('"+
    str_target+"', '"+ dt2dtstr(dt_prev_month)+"');\">"+
    "<img src=\"../imagenes/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_calendar1('"
    +str_target+"', '"+dt2dtstr(dt_next_month)+"');\">"+
    "<img src=\"../imagenes/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)
          // 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 href=\"javascript:window.opener."+str_target+
          ".value='"+dt2dtstr(dt_current_day)+"'; window.opener.recarga(); 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.forma.submit(); 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=\"#87CEFA\">&nbsp;"+
    "<input type=\"hidden\" name=\"time\" value=\""+ dt2dtstr(dt_datetime)+
    "\"></td></tr>\n</form>\n" +
    "</table>\n" +
    "</tr>\n</td>\n</table>\n" +
    "</body>\n" +
    "</html>\n";

  var vWinCal = window.open("", "Calendar",
    "width=180,height=210,status=no,resizable=no,top=200,left=200");
  vWinCal.opener = self;
  var calc_doc = vWinCal.document;
  calc_doc.write (str_buffer);
  calc_doc.close();
}