// Title: Timestamp picker
// Description: See the demo at url
// URL: http://www.softcomplex.com/products/tigra_calendar/
// 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>
// 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) {
var arr_months = ["Gennaio", "Febbraio", "Marzo", "Aprile", "Maggio", "Giugno",
"Luglio", "Agosto", "Settembre", "Ottobre", "Novembre", "Dicembre"];
var week_days = ["Do", "Lu", "Ma", "Me", "Gi", "Ve", "Sa"];
var n_weekstart = 1; // day week starts from (normally 0 or 1)

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.getFullYear()-1);

var dt_next_year = new Date(dt_datetime);
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"+
"<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('"+
str_target+"', '"+dt2dtstr4x(dt_prev_year)+"');\">"+
"<img src=\"/img/prev_year.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"previous year\"></a></td>\n"+
"        <td bgcolor=\"#4682B4\"><a href=\"javascript:window.opener.show_calendar4x('"+
str_target+"', '"+ dt2dtstr4x(dt_prev_month)+"');\">"+
"<img src=\"/img/prev.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"previous 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('"
+str_target+"', '"+dt2dtstr4x(dt_next_month)+"');\">"+
"<img src=\"/img/next.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"next month\"></a></td>\n"+
"        <td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:window.opener.show_calendar4x('"
+str_target+"', '"+dt2dtstr4x(dt_next_year)+"');\">"+
"<img src=\"/img/next_year.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"next 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)+"'; 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)+"'; 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\">"+
//"<font color=\"White\" face=\"tahoma, verdana\" size=\"2\">"+
//"Time: <input type=\"text\" name=\"time\" value=\""+dt2tmstr4x(dt_datetime)+
//"\" size=\"8\" maxlength=\"8\"></font></td></tr>\n</form>\n" +
str_buffer +=
"</table>\n" +
"</tr>\n</td>\n</table>\n" +
"</body>\n" +
"</html>\n";


var vWinCal = window.open("", "Calendar",
"width=200,height=200,status=no,resizable=no,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+)\s+(\d+)\:(\d+)\:(\d+)$/;
var re_date = /^(\d+)\/(\d+)\/(\d+)$/;
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));
return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1));
}

function dt2dtstr4x(dt_datetime) {
return (new String (
<!--(dt_datetime.getMonth()+1)+"-"+dt_datetime.getDate()+"-"+dt_datetime.getFullYear()));-->
dt_datetime.getDate()+"/"+(dt_datetime.getMonth()+1)+"/"+dt_datetime.getFullYear()));
}

function dt2tmstr4x(dt_datetime) {
return (new String (
" "+dt_datetime.getMinutes()+":"+dt_datetime.getHours()+":"+dt_datetime.getSeconds()));
}


