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 = ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"];
	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));
	if(!dt_datetime){dt_datetime = new Date();}
	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);
	
	// 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=\"#999999\">\n"+
		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
		"<tr>\n	<td bgcolor=\"#999999\"><a href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_prev_month)+"');\">"+
		"<b><font color=\"white\" face=\"verdana\" size=\"2\">&laquo;</font></b></a></td>\n"+
		"	<td bgcolor=\"#999999\" colspan=\"5\">"+
		"<font color=\"white\" face=\"tahoma, verdana\" size=\"2\"><B><CENTER>"
		+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</CENTER></B></font></td>\n"+
		"	<td bgcolor=\"#999999\" align=\"right\"><a href=\"javascript:window.opener.show_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+"');\">"+
		"<b><font color=\"white\" face=\"verdana\" size=\"2\">&raquo;</font></b></a></td>\n</tr>\n"
	);

	var dt_current_day = new Date(dt_firstday);
	// weekdays titles
	str_buffer += "<tr>\n";
	for (var n=0; n<7; n++)
		str_buffer += "	<td bgcolor=\"#666666\">"+
		"<font color=\"white\" face=\"tahoma, verdana\" size=\"2\"><CENTER><B>"+
		week_days[(n_weekstart+n)%7]+"</B></CENTER></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=\"#FF9900\" align=\"right\">";
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
					// weekend days
					str_buffer += "	<td bgcolor=\"#EEEEEE\" 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='"+dt2dtstr(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='"+dt2dtstr(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 +=
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"</body>\n" +
		"</html>\n";

	var vWinCal = window.open("", "Calendar", 
		"width=200,height=250,status=no,resizable=yes,top=200,left=200");
	vWinCal.opener = self;
	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 str2dt (str_datetime) {
	var re_date = /^(\d+)\/(\d+)\/(\d+)/;
	if (!re_date.exec(str_datetime))
		return false;
	newYear=(RegExp.$3.length <= 2 ? "20"+RegExp.$3 : RegExp.$3)
	return (new Date (newYear, RegExp.$2-1, RegExp.$1, RegExp.$4, RegExp.$5, RegExp.$6));
}
function dt2dtstr (dt_datetime) {
	return (new String (
			dt_datetime.getDate()+"/"+(dt_datetime.getMonth()+1)+"/"+dt_datetime.getFullYear()+" "));
}
function dt2tmstr (dt_datetime)
{
//return (new String (
//dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}

function validateForm(thisform)
{
	var errorStr="";	
	if (!thisform.booking_name.value) errorStr=errorStr+"\nYour Name";
	if (!thisform.booking_tel.value) errorStr=errorStr+"\nYour Contact Telephone";
	if (!thisform.booking_email.value || (thisform.booking_email.value.indexOf("@")==-1 || thisform.booking_email.value.indexOf(".")==-1) ) errorStr=errorStr+"\nYour Correct Email Address";
	if (!thisform.booking_date.value) errorStr=errorStr+"\nYour Booking Date";
	if (!thisform.booking_occ.value) errorStr=errorStr+"\nThe Occasion";
	if (!thisform.booking_persons.value || isNaN(thisform.booking_persons.value)) errorStr=errorStr+"\nThe Number Of People";
	if (!thisform.booking_pickup_time.value) errorStr=errorStr+"\nPick Up Time";
	if (!thisform.booking_collection_time.value) errorStr=errorStr+"\nCollection Time";
	if (!thisform.booking_destination.value) errorStr=errorStr+"\nDestination";
	if (!thisform.booking_pickup_addr.value) errorStr=errorStr+"\nPick Up Address";
	if (!thisform.booking_terms.checked) errorStr=errorStr+"\nYour Must Accept Our Terms And Conditions";
	
	if (errorStr){alert("Please check the following fields:\n"+errorStr);return false;}
}
