// 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_calendar2(str_target, str_datetime) {
	var path = document.getElementById("contextPath").value;
	var arr_months = new Array();
		arr_months = ['Th\u00e1ng 1', 'Th\u00e1ng 2', 'Th\u00e1ng 3', 'Th\u00e1ng 4',
		 'Th\u00e1ng 5', 'Th\u00e1ng 6','Th\u00e1ng 7', 'Th\u00e1ng 8', 
		 'Th\u00e1ng 9', 'Th\u00e1ng 10', 'Th\u00e1ng 11', 'Th\u00e1ng 12'];
	var week_days = new Array();
		week_days[0]='CN';
		week_days[1]='Hai';
		week_days[2]='Ba';
		week_days[3]='T&#432;';
		week_days[4]='N&#259;m';
		week_days[5]='S&#225;u';
		week_days[6]='B&#7843;y'; 
	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_datetime = (str_datetime == null || str_datetime =="" ?  new Date() : check_data(str_target));
	
	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"+
"        <META http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\n"+
"</head>\n"+
"<script language=\"JavaScript\" src=\"/admin/js/ts_picker2.js\"></script>\n"+
"<body bgcolor=\"White\" topmargin=2 leftmargin=2 marginwidth=2 marginheight=2>\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_calendar2('"+
str_target+"', '"+dt2dtstr4x(dt_prev_year)+"');\">"+
"<img src=\"/admin/images/prev_year.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"N\u0103m tr\u01b0\u1edbc\"></a></td>\n"+
"        <td bgcolor=\"#4682B4\"><a href=\"javascript:window.opener.show_calendar2('"+
str_target+"', '"+ dt2dtstr4x(dt_prev_month)+"');\">"+
"<img src=\"/admin/images/prev.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"Th\u00e1ng tr\u01b0\u1edbc\"></a></td>\n"+
"        <td align=\"center\" bgcolor=\"#4682B4\" colspan=\"3\">"+
"<b><font color=\"white\" face=\"tahoma, verdana\" size=\"1\"> "
+arr_months[dt_datetime.getMonth()]+" <br>N\u0103m "+dt_datetime.getFullYear()+"</font></b></td>\n"+
"        <td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:window.opener.show_calendar2('"
+str_target+"', '"+dt2dtstr4x(dt_next_month)+"');\">"+
"<img src=\"/admin/images/next.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"Th\u00e1ng ti\u1ebfp theo\"></a></td>\n"+
"        <td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:window.opener.show_calendar2('"
+str_target+"', '"+dt2dtstr4x(dt_next_year)+"');\">"+
"<img src=\"/admin/images/next_year.gif\" width=\"16\" height=\"16\" border=\"0\""+
" alt=\"N\u0103m ti\u1ebfp theo\"></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 align=\"center\" 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=\"left\">";
			else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
				// weekend days
				str_buffer += "        <td bgcolor=\"#DBEAF5\" align=\"left\">";
			else
				// print working days of current month
				str_buffer += "        <td bgcolor=\"white\" align=\"left\">";
			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: time
	//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=188,height=200,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+)\s+(\d+)\:(\d+)\:(\d+)$/;
	var re_date = /^(\d+)\/(\d+)\/(\d+)$/;
	if (!re_date.exec(str_datetime)) 
	{
		alert("Sai ki?u ??nh d?ng: " + str_datetime);
		return new Date();
	}else{
		return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1));
	}
	
		
	//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.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 (
		" "+dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}

//Ham kiem tra value co phai kieu date ko
function isValidDate(strDate)
{
  var retval = 0
  var aDDMMCCYY
  var dtest
  // Kiem tra dung format
  if (/^(\d\d?-\d\d?-\d{4})|(\d\d?\/\d\d?\/\d{4})|(\d{8})$/.test(strDate))
  {
    if (/\//.test(strDate))
    {
      aDDMMCCYY = strDate.split("/");
    }
    else
    if (/-/.test(strDate))
    {
      aDDMMCCYY = strDate.split("-");
    }
    else
    {
      aDDMMCCYY = Array(strDate.substr(0,2), strDate.substr(2,2), strDate.substr(4,4))
    }    
	dtest = new Date(aDDMMCCYY[1] + "/" + aDDMMCCYY[0] + "/" + aDDMMCCYY[2]);      
    if (dtest.getDate() != aDDMMCCYY[0] || dtest.getMonth() +1 != aDDMMCCYY[1] || dtest.getFullYear() != aDDMMCCYY[2])
    {
      retval = 2
    }
  }
  else
  {
	retval = 1
  }
  return retval
}

function check_data(obj)
 {
	var str = obj.value;
	if(str!=""){
	if (isValidDate(str)!=0)
	{
		alert("Vui ḷng nh?p ngày theo d?ng: dd/mm/yyyy.");
		obj.value="";
		obj.focus();
		//window.close();
		return false;
	}
	}
	return true;
}

