/*
	Written by Nathan Wilkes, Saraden Studios
	All rights reserved
	Copyright (c) 2002
	nathan@saraden.co.nz
*/

		function	UpdateTimes()
		{
			//if (document.layers) return 0;
			if (clockTID) clearTimeout (clockTID);
		
			theStr = FormatUTCDate(CalcTime (12, 9, 1, 2, 3))
					
			if (document.all)
			// IE specific code
			{
				document.getElementById("timeblock").innerHTML = theStr;
				
				tdate = new Date();
				tdate2 = new Date();
				tdate2.setMinutes (tdate2.getMinutes()+1, 0, 0);
				theOffset = Date.parse (tdate2.toString()) - Date.parse (tdate.toString());
				clockTID = setTimeout ("UpdateTimes();", theOffset);				
			}
			else if (document.getElementById) {
			// DOM code			
				document.write(theStr);
			}
			else if (document.layers)
			// legacy code
			{
				document.write(theStr);
			}
		}
		
		clockTID = false;

//////////////////////////////////////////////////////////////////////////////////////////////////////////////

		var ServerTime = 1219940254
		var TempDate = new Date();
		var LocalTime = Date.UTC(TempDate.getUTCFullYear(), TempDate.getUTCMonth(), TempDate.getUTCDate(), TempDate.getUTCHours(), TempDate.getUTCMinutes(), TempDate.getUTCSeconds(), 0)/1000;
		var TimeOffset = LocalTime-ServerTime;

		//Finds the date of a given "day" in a target month
		//TargetCount = 1 for 1st occurance, 2 for 2nd etc
		//		Set to 0 for last occurance in month
		//Dates (should) be UTC
		//Returns 0 if no match found
	
		function DateOfDay (TargetMonth, TargetYear, TargetDay, TargetCount)
		{
			var TestDate = new Date(0);
			var utcDay, utcCount;
			
			TestDate.setUTCFullYear (TargetYear);
			TestDate.setUTCMonth (TargetMonth);
			TestDate.setUTCDate (1);
			utcDay = 0;
			utcCount = 0;

			while (TestDate.getUTCMonth() == TargetMonth)
			{
				if (TestDate.getUTCDay() == TargetDay)
				{
					utcDay = TestDate.getUTCDate();
					if (++utcCount == TargetCount) break;
				}
				TestDate.setUTCDate (TestDate.getUTCDate()+1);
			}
		
			return utcDay;
		}
		
		function CalcTime (GMTOffset, DSTStartMonth, DSTStartOcc, DSTEndMonth, DSTEndOcc)
		{
			//Result is a timezone-adjusted date stored in the UTC portion of the date object
			//LOCALIZATION FUNCTIONS WILL NOT WORK ON THESE RESULTS
			
			var fDST = false;
			var UTCDate = new Date();

//			fDST = CheckDST (GMTOffset, DSTStartMonth, DSTStartOcc, DSTEndMonth, DSTEndOcc);

			UTCDate.setUTCSeconds(UTCDate.getUTCSeconds()-TimeOffset); //Adjust local time to server time
			UTCDate.setUTCHours(UTCDate.getUTCHours()+GMTOffset);	//Add GMT offset
			if (fDST) UTCDate.setUTCHours(UTCDate.getUTCHours()+1);		//If DST flag is set, increase time by 1 hour

			return UTCDate;
		}
		
		function CheckDST (GMTOffset, DSTStartMonth, DSTStartOcc, DSTEndMonth, DSTEndOcc)
		{
			//NZST = +12  (GMTOffset = 12)
			//DST Start: First Sunday in October (DSTStartMonth = 9, DSTStartOcc = 1)
			//DST End: Third Sunday in March (DSTEndMonth = 2, DSTEndOcc = 3)
			
			//AUS EST = +10  (GMTOffset = 10)
			//DST Start: Last Sunday in October (DSTStartMonth = 9, DSTStartOcc = 0)
			//DST End: Last Sunday in March (DSTEndMonth = 2, DSTEndOcc = 0)
			
			//US EST = -5
			//US CST = -6
			//US PST = -8
			//DST Start: First Sunday in April
			//DST End: Last Sunday in October
			
			//Europe
			//Start: Last Sunday in March at 1 am.
			//End: Last Sunday in October at 1 am
					
			var fDST = false;
			var UTCDate = new Date();
			var utcMonth, utcDay;
		
			UTCDate.setUTCSeconds(UTCDate.getUTCSeconds()-TimeOffset); //Adjust local time to server time
			UTCDate.setUTCHours(UTCDate.getUTCHours()+GMTOffset);
			
			//If we're in range exclusive, it's DST
			utcMonth = UTCDate.getUTCMonth();
			if (DSTStartMonth > DSTEndMonth)
				{if ((utcMonth > DSTStartMonth) || (utcMonth < DSTEndMonth)) fDST = true;}
			else
				{if ((utcMonth > DSTStartMonth) && (utcMonth < DSTEndMonth)) fDST = true;}
			
			//In first month - locate occurance of sunday
			if (utcMonth == DSTStartMonth)
			{
				utcDay = DateOfDay (DSTStartMonth, UTCDate.getUTCFullYear(), 0, DSTStartOcc);
				if (UTCDate.getUTCDate() >= utcDay) fDST = true;
			}
			
			//In last month - locate occurance of sunday
			if (utcMonth == DSTEndMonth)
			{
				utcDay = DateOfDay (DSTEndMonth, UTCDate.getUTCFullYear(), 0, DSTEndOcc);
				if (UTCDate.getUTCDate() < utcDay) fDST = true;
			}

			return fDST;
		}
		
		function FormatUTCDate (DateObj)
		//Uses UTC portion of date object - assumes this has been adjusted to appropriate timezone for display
		//Example would be to use this to convert a CalcTime result into a display string
		{
			var dDay, dMonth, dYear, dHour, dMinute, dSec, dSign
			var padMonth, padYear, padMinute, padSec;
			var aMonthName = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
			
			dDay = DateObj.getUTCDate();
			dMonth = DateObj.getUTCMonth()+1;
			dYear = DateObj.getUTCFullYear();
			dHour = DateObj.getUTCHours();
			dMinute = DateObj.getUTCMinutes();
			dSec = DateObj.getUTCSeconds();
			dSign = "am";
			if (dHour > 12) {dHour-=12; dSign="pm";}
			
			padMonth = "";
			if (dMonth < 10) padMonth = "0";
			padYear = "";
			if (dYear < 10) padYear = "0";
			padMinute = "";
			if (dMinute < 10) padMinute = "0";
			padSec = "";
			if (dSec < 10) padSec = "0";
			retval=dDay+" "+aMonthName[dMonth-1]+" "+dYear+"<br>"+dHour+":"+padMinute+dMinute+dSign;
			return retval
		}