
function show_calendar(str_target, str_date) {
	var arr_months = ["January", "February", "March", "April", "May", "June",
		"July", "August", "September", "October", "November", "December"];
	var week_days = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
	var n_weekstart = 1; 

	if (str_date != null && str_date != "") {
		if (str2dt2(str_date) == false) {
		 	alert("The Incorrect format of date(DD.MM.YYYY): "+str_date);
			return;
		}
	}
	var dt_date = (str_date == null || str_date =="" ?  new Date() : str2dt2(str_date));
	var dt_prev_month = new Date(dt_date);
	dt_prev_month.setMonth(dt_date.getMonth()-1);
	if (dt_date.getMonth()%12 != (dt_prev_month.getMonth()+1)%12) {
		dt_prev_month.setMonth(dt_date.getMonth());
		dt_prev_month.setDate(0);
	}
	var dt_prev_year = new Date(dt_date);
	dt_prev_year.setMonth(dt_date.getMonth()-12);

	var dt_next_month = new Date(dt_date);
	dt_next_month.setMonth(dt_date.getMonth()+1);
	if ((dt_date.getMonth() + 1)%12 != dt_next_month.getMonth()%12)
		dt_next_month.setDate(0);

	var dt_next_year = new Date(dt_date);
	dt_next_year.setMonth(dt_date.getMonth()+12);
	
	var dt_firstday = new Date(dt_date);
	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);
	
	var str_buffer = new String (
		"<html>\n"+
		"<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\n"+
		"<head>\n"+
		"	<title>Selection of date</title>\n"+
		"</head>\n"+
        "<body bgcolor=\"#fafafa\" text=\"#686868\" alink=\"#ffffff\" link=\"#ffffff\" vlink=\"#ffffff\" marginwidth=\"10\" marginheight=\"10\" topmargin=\"10\" bottommargin=\"10\" leftmargin=\"10\" rightmargin=\"10\">\n"+
		"<table align=center cellspacing=\"0\" cellpadding=\"1\" border=\"0\" width=150>\n"+
		"<tr bgcolor=\"#fafafa\">\n<td align=center nowrap><a title=\"Предыдущий год\" href=\"javascript:window.opener.show_calendar('"+str_target+"', '"+dt2dtstr2(dt_prev_year)+"');\" style=\"text-decoration: none; color:#000000; font-family: verdana; font-size: 11px; font-weight:bold; text-change:uppercase;\"><img border=0 src=\"/common/img/arr_ll.gif\"></a>&nbsp;&nbsp;<a title=\"Предыдущий месяц\" style=\"text-decoration: none; color:#000000; font-size:9px; font-family: Tahoma\" href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr2(dt_prev_month)+"');\">"+
		"<img border=0 src=\"/common/img/arr_l.gif\"></a></td>\n"+
		"<td colspan=\"5\" align=center ><font style=\"color:#3d3d3d; font-weight:bold; text-transform:uppercase; font-size:11px; font-family:Tahoma;\">"
		+arr_months[dt_date.getMonth()]+" "+dt_date.getFullYear()+"</font></td>\n"+
		"<td align=\"center\" nowrap><a title=\"Следующий месяц\" style=\"text-decoration: none; color:#000000; font-size:11px; font-family: Tahoma\" href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+dt2dtstr2(dt_next_month)+"');\">"+
		"<img border=0 src=\"/common/img/arr_r.gif\"></a>&nbsp;&nbsp;<a title=\"Следующий год\" href=\"javascript:window.opener.show_calendar('"+str_target+"', '"+dt2dtstr2(dt_next_year)+"');\" style=\"text-decoration: none; color:#000000; font-family: verdana; font-size: 11px; font-weight:bold; text-change:uppercase;\"><img border=0 src=\"/common/img/arr_rr.gif\"></a></td>\n</tr><tr><td colspan=7 height=3px><spacer></spacer></td></tr>\n"
	);

	var dt_current_day = new Date(dt_firstday);
	var str_color="";
	str_buffer += "<tr bgcolor=\"#dbdbdb\">\n";
	for (var n=0; n<7; n++)
		str_buffer += "<td align=center style=\"padding:2px;\"><font style=\"color:#3d3d3d; font-weight:bold; font-size:11px; font-family: Tahoma\"><b>"+
		week_days[(n_weekstart+n)%7]+"</b></font></td>\n";
	str_buffer += "</tr><tr><td colspan=7 height=3px><spacer></spacer></td></tr>\n";
	while (dt_current_day.getMonth() == dt_date.getMonth() ||
		dt_current_day.getMonth() == dt_firstday.getMonth()) {
		str_buffer += "<tr>\n";
		for (var n_current_wday=0; n_current_wday<7; n_current_wday++) {
				if (dt_current_day.getDate() == dt_date.getDate() &&
					dt_current_day.getMonth() == dt_date.getMonth()){
					
					str_buffer += "	<td  align=\"center\" bgcolor=\"#4EA37E\">";
					str_color = "color:#ffffff;";}
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6){
					str_buffer += "	<td align=\"center\">";
					str_color = "color:#4EA37E;";}
				else{					
					str_buffer += "	<td align=\"center\">";
					str_color = "color:#4EA37E;";}

				if (dt_current_day.getMonth() == dt_date.getMonth())
					
					str_buffer += "<a style=\"" + str_color + " font-size:9px; font-family: Tahoma; text-decoration: none;\" href=\"javascript:window.opener."+str_target+".value='"+dt2dtstr2(dt_current_day)+"'; self.close();\">"+
					"";
				else 
					
					str_buffer += "<a style=\"color:#686868; font-size:9px; font-family: Tahoma; text-decoration: none;\" href=\"javascript:window.opener."+str_target+".value='"+dt2dtstr2(dt_current_day)+"'; self.close();\">"+
					"";
				str_buffer += dt_current_day.getDate()+"</a></td>\n";
				dt_current_day.setDate(dt_current_day.getDate()+1);
		}
		
		str_buffer += "</tr>\n";
	}
	
	str_buffer += "<tr><td colspan=7 style=\"padding-top:8px;\"><font style=\"color:#3a3a3a; font-size:9px; font-family: Tahoma;\">Текущая дата:</font>&nbsp;<a style=\"text-decoration: none; color:#3a3a3a; font-size:9px; font-family: Tahoma\" href=\"javascript:window.opener."+str_target+".value='"+
	dt2dtstr2(new Date())+"';self.close();\">"+dt2dtstr2(new Date())+"</a></td></tr>";
	
	str_buffer +=
		"</table>\n" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendar", 
		"width=200,height=160,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();
}

function str2dt2 (str_date) {
	var re_date = /^(\d+)\.(\d+)\.(\d+)$/;
	if (!re_date.exec(str_date)) {
		return (false);
	} else {
		var arrD = new Array();
		var m, d, Y;
		arrD = str_date.split(".");
		d = parseInt(correct_number(arrD[0]));
		m = parseInt(correct_number(arrD[1])) - 1;
		Y = parseInt(arrD[2]);
		return (new Date(Y, m, d));
		//return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1));
	}
}

function dt2dtstr2 (dt_date) {
var bday, bmonth;
bday = dt_date.getDate().toString();
bmonth = (dt_date.getMonth()+1).toString();

if (bmonth.length == 1) {
	bmonth = "0" + bmonth;
}
if (bday.length == 1) {
	bday = "0" + bday;
}

	return (new String (
			bday+"."+bmonth+"."+dt_date.getFullYear()));
}

function correct_number(strIn) {
	var res;
	if (strIn.length = 2 && (strIn.substr(0, 1) == '0')) {
		res = strIn.substr(1, 1);
	} else {
		res = strIn;
	}
	return (res);
}


