// Title: Timestamp picker
// Description: See the demo at url
// URL: http://www.geocities.com/tspicker/
// Version: 1.0.a (Date selector only) reworked by Richard Perry
// Date: 12-12-2001 (mm-dd-yyyy)
// Version 1.0.b reworked by Eddie May. Added time display and made compliant with Netscape 6.2.
// Date 22/01/2002 (dd-mm-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_calendar4x(str_target, str_datetime) {
    if(lang=='es'){
        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 n_year = "aņo siguiente";
        var n_month = "mes siguiente";
        var p_year = "aņo anterior";
        var p_month = "mes anterior";
		}
		if(lang=='en'){
        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 n_year = "next year";
        var n_month = "next month";
        var p_year = "previous year";
        var p_month = "previous month";
    }

		var dt_datetime = (str_datetime == null || str_datetime =="" ?  new Date() : str2dt4x(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_prev_year = new Date(dt_datetime);
        //dt_prev_year.setYear(dt_datetime.getYear()-1);
		dt_prev_year.setYear(dt_datetime.getFullYear()-1);
       
        var dt_next_year = new Date(dt_datetime);
        //dt_next_year.setYear(dt_datetime.getYear()+1);
		dt_next_year.setYear(dt_datetime.getFullYear()+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"+
                "</head>\n"+
                "<script> var target=\""+str_target+"\"; </script>\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_calendar4x("+
                "target, '"+dt2dtstr4x(dt_prev_year)+"'+document.cal.time.value);\">"+
                "<img src=\""+ myPath +"js/prev_year.gif\" width=\"16\" height=\"16\" border=\"0\""+
                " alt=\""+ p_year + "\"></a></td>\n"+
                "        <td bgcolor=\"#4682B4\"><a href=\"javascript:window.opener.show_calendar4x("+
                "target, '"+ dt2dtstr4x(dt_prev_month)+"'+document.cal.time.value);\">"+
                "<img src=\""+ myPath +"js/prev.gif\" width=\"16\" height=\"16\" border=\"0\""+
                " alt=\"" + p_month + "\"></a></td>\n"+

                "        <td bgcolor=\"#4682B4\" colspan=\"3\">"+
                "<font color=\"white\" face=\"tahoma, verdana\" size=\"1\">"
                +arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</font></td>\n"+

                "        <td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:window.opener.show_calendar4x("+
                "target, '"+dt2dtstr4x(dt_next_month)+"'+document.cal.time.value);\">"+
                "<img src=\""+ myPath +"js/next.gif\" width=\"16\" height=\"16\" border=\"0\""+
                " alt=\"" + n_month + "\"></a></td>\n"+
                "        <td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:window.opener.show_calendar4x("+
                "target, '"+dt2dtstr4x(dt_next_year)+"'+document.cal.time.value);\">"+
                "<img src=\""+ myPath +"js/next_year.gif\" width=\"16\" height=\"16\" border=\"0\""+
                " alt=\"" + n_year + "\"></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='"+dt2dtstr4x(dt_current_day)+"'+document.cal.time.value; 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='"+dt2dtstr4x(dt_current_day)+"'+document.cal.time.value; 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 +=
                  "</table><form name=\"cal\">\n"+
                  "<input type=\"hidden\" name=\"time\" value=\""+dt2tmstr4x(dt_datetime)+
                  "\"></form>\n" +
                  "</td>\n</tr>\n</table>\n" +
                  "</body>\n" +
                  "</html>\n";

        var vWinCal = window.open("", "Calendar",
                "width=250,height=215,status=no,resizable=yes,top=200,left=200");
        vWinCal.opener = self;
        vWinCal.focus();
        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 str2dt4x(str_datetime) {
   var re_date = /^(\d+)\/(\d+)\/(\d+)$/;
   //var re_date = /^(\d+)\/(\d+)\/(\d+)\s+(\d+)\:(\d+)\:(\d+)$/;
	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 dt2dtstr4x(dt_datetime) {
	return (new String (
			dt_datetime.getDate()+"/"+(dt_datetime.getMonth()+1)+"/"+dt_datetime.getFullYear()));
	        <!--dt_datetime.getDate()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getFullYear()+" "));-->
}
function dt2tmstr4x(dt_datetime) {
	return (new String (""));
  //return (new String (" "+dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}