function Laiks(dt_datetime) {
return (new String (ToDouble (dt_datetime.getDate())+"."+ToDouble((dt_datetime.getMonth()+1))+"."+ToDouble(dt_datetime.getYear())));
}

var npr=1;
function show_calendar(str_target, str_datetime) {
	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; // day week starts from (normally 0 or 1)

	var dt_datetime = (str_datetime == null || str_datetime =="" ?  new Date() : str2dt(str_datetime));
var dtd_datetime = new Date();

	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_prev_month = new Date(dt_datetime);
	dt_prev_month.setMonth(dt_datetime.getMonth()-1);
	var dt_next_month = new Date(dt_datetime);
	dt_next_month.setMonth(dt_datetime.getMonth()+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
//alert ("!--"+str_datetime);
seld="<table border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">";
seld+="<tr><td width=\"100%\">";
seld+="<table border=\"0\" width=\"200\" cellpadding=\"0\" cellspacing=\"0\"><tr>";
seld+="<td width=\"15\" bgcolor=\"#e7e7e7\"><a href=\"javascript:show_calendar('"+str_target+"', '"+Laiks(dt_prev_month)+"');\"><img border=\"0\" src=\"/images/backL.gif\"></a></td>";
seld+="<td width=\"100\" align=\"center\" bgcolor=\"#e7e7e7\">"+arr_months[dt_datetime.getMonth()]+"</td>";
seld+="<td width=\"45\" align=\"center\" bgcolor=\"#e7e7e7\">"+dt_datetime.getFullYear()+"</td>";
seld+="<td width=\"25\" bgcolor=\"#e7e7e7\">"; //<a href=\"javascript:show_calendar('"+str_target+"', '"+ Laiks(dt_next_year)+"');\"><img border=\"0\" src=\"/images/upL.gif\"></a>";
//seld+="<br><a href=\"javascript:show_calendar('"+str_target+"', '"+ Laiks(dt_prev_year)+"');\"><img border=\"0\" src=\"/images/downL.gif\"></a>
seld+="</td>";
seld+="<td width=\"15\" bgcolor=\"#e7e7e7\"><a href=\"javascript:show_calendar('"+str_target+"', '"+ Laiks(dt_next_month)+"');\"><img border=\"0\" src=\"/images/nextL.gif\"></a></td>";
seld+="</tr></table>";
seld+="</td></tr></table>";

	
	// print calendar header
	var str_buffer = new String (
		"<table class=\"clsOTable\" cellspacing=\"0\" border=\"0\" width=\"200\">\n"+
		"<tr><td align=\"right\" bgcolor=\"#d9d9d9\"><a href=\"javascript:Set();\">"+
		"Close</a>&nbsp;&nbsp;</td><tr><td bgcolor=\"#ffffff\">\n"+seld+
		"<table class=\"cls1Table\" cellspacing=\"2\" cellpadding=\"3\" border=\"0\" width=\"100%\">\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=\"#faf7f0\" align=\"right\">"+
		""+
		week_days[(n_weekstart+n)%7]+"</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++) {
		npr=1;
				if (dt_current_day.getDate() == dt_datetime.getDate() &&
					dt_current_day.getMonth() == dt_datetime.getMonth())
					// print current date shodiena
					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\">";
					npr=0;
					}
				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
					if (npr==1 && (dt_current_day<=dtd_datetime))
					str_buffer += "<a href=\"javascript:"+str_target+
					"='"+Laiks(dt_current_day)+"'; Set();\">"+
					"<font color=\"black\">";
					if (npr==0 || (dt_current_day>dtd_datetime))
					str_buffer += "<font color=\"gray\">";					
					}
				else 
					// print days of other months
					if (npr==1 && (dt_current_day<=dtd_datetime))
					str_buffer += "<a href=\"javascript:"+str_target+
					"='"+Laiks(dt_current_day)+"'; Set();\">"+
					"<font color=\"gray\">";
					if (npr==0 || (dt_current_day>dtd_datetime))
					str_buffer += "<font color=\"gray\">";							
				if (npr==1 && (dt_current_day<=dtd_datetime))
				str_buffer += dt_current_day.getDate()+"</font></a></td>\n";
				if (npr==0 || (dt_current_day>dtd_datetime))
				str_buffer += dt_current_day.getDate()+"</font></td>\n";
				dt_current_day.setDate(dt_current_day.getDate()+1);
		}
		// print row footer
		str_buffer += "</tr>\n";
	}
	// print calendar footer
		str_buffer += "</table>\n" +
		"</tr>\n</td>\n</table>\n";
	
document.getElementById('Callendar').innerHTML=str_buffer;
}
function str2dt (str_datetime) {
	var re_date = /^(\d+)\.(\d+)\.(\d+)$/;
	if (!re_date.exec(str_datetime)) {
		alert("Invalid Datetime format: "+ str_datetime);
		dt_datetime=new Date();
		return dt_datetime;}
	return (new Date ("20"+RegExp.$3, RegExp.$2-1, RegExp.$1)); //
}

function dt2dtstr (dt_datetime) {
	return (new String (
			dt_datetime.getDate()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getFullYear()+" "));
}

function dt (dt_datetime) {
return (new String (ToDouble(dt_datetime.getDate())+"."+ToDouble((dt_datetime.getMonth()+1))+"."+ToDouble(dt_datetime.getYear())));
}

function dt2tmstr (dt_datetime) {
return (new String (dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}

function dt2 (dt_datetime) {
return (new String (ToDouble(dt_datetime.getDate())+""+ToDouble((dt_datetime.getMonth()+1))+""+ToDouble(dt_datetime.getYear())));
}

function ToDouble(a) {
var tmp="00"+a
var k="";
var t=tmp.length;
for (i=t; i>=t-2; i--) {
	k=tmp.charAt(i)+k;
}	
return k;
}