
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("Incorrect date format: "+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=windows-1251\">\n"+
		"<head>\n"+
		"	<title>Date selection</title>\n"+
		"</head>\n"+
        "<body bgcolor=\"#ffffff\" text=\"#516D89\" alink=\"#516D89\" link=\"#516D89\" marginwidth=\"10\" marginheight=\"5\" topmargin=\"5\" bottommargin=\"10\" leftmargin=\"10\" rightmargin=\"10\">\n"+
		"<table align=center cellspacing=\"2\" cellpadding=\"1\" border=\"0\" width=200>\n"+
		"<tr>\n<td colspan='7'><table cellpadding='0' cellspacing='0' border=0' width='100%'><tr><td nowrap><a title=\"Previous year\" href=\"javascript:window.opener.show_calendar('"+str_target+"', '"+dt2dtstr2(dt_prev_year)+"');\"><img src='/common/img/cln-f.gif' border='0'></a>&nbsp;<a title=\"Previous month\" href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr2(dt_prev_month)+"');\">"+
		"<img src='/common/img/cln-pr.gif' border='0'></a></td>\n"+
		"<td width='100%' align=center ><b style=\"color:#FF6600; font-size:12px; font-family: arial\">"
		+arr_months[dt_date.getMonth()]+" "+dt_date.getFullYear()+"</b></td>\n"+
		"<td align=\"right\" nowrap><a title=\"Next month\"  href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+dt2dtstr2(dt_next_month)+"');\">"+
		"<img src='/common/img/cln-nxt.gif' border='0'></a>&nbsp;<a title=\"next year\" href=\"javascript:window.opener.show_calendar('"+str_target+"', '"+dt2dtstr2(dt_next_year)+"');\" ><img src='/common/img/cln-l.gif' border='0'></a></td></tr></table></td>\n</tr>\n"
	);

	var dt_current_day = new Date(dt_firstday);
	str_buffer += "<tr>\n";
	for (var n=0; n<7; n++)
		str_buffer += "<td width='14.3%' align=center style='border-top:3px solid #C3CCD6; color:#4583BE; font:11px Verdana'>"+
		week_days[(n_weekstart+n)%7]+"</td>\n";
	str_buffer += "</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.getMonth() == dt_date.getMonth())
                    if (dt_current_day.getDate() == dt_date.getDate())					
    					str_buffer += "	<td  align=\"center\" bgcolor=\"#FF6600\"><a style=\"color:#fff;font-size:8pt; font-family: arial; text-decoration: none;\" href=\"javascript:window.opener."+str_target+ ".value='"+dt2dtstr2(dt_current_day)+"'; self.close();\">";
					else
					str_buffer += "<td align=\"center\" bgcolor='#E2E6EB'><a style=\"font-size:8pt; font-family: arial; text-decoration: none;\" href=\"javascript:window.opener."+str_target+".value='"+dt2dtstr2(dt_current_day)+"'; self.close();\">"+
					"";
				else 
					
					str_buffer += "<td align=\"center\" bgcolor='#C3CCD6'><a style=\" font-size:8pt; font-family: arial; 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><b style=\" font-size:9pt; font-family: arial;\">Current date:</b>&nbsp;<a style=\"text-decoration: none; color:#FF6600; font-size:9pt; font-family: arial\" href=\"javascript:window.opener."+str_target+".value='"+
	dt2dtstr2(new Date())+"';self.close();\"><b>"+dt2dtstr2(new Date())+"</b></a></td></tr>";
	
	str_buffer +=
		"</table>\n" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendar", 
		"width=240,height=180,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);
}


