var timerID ;
var strMonth;


function tzone(tz, os, ds, cl)
{
	this.ct = new Date(0) ;		// datetime
	this.tz = tz ;		// code
	this.os = os ;		// GMT offset
	this.ds = ds ;		// has daylight savings
	this.cl = cl ;		// font color
}

function UpdateClocks()
{
	// www.timeanddate.com/worldclock
	var ct = new Array(
		new tzone('current time in Mumbai: ', +5.5, 0, 'black')
	) ;

	var dt = new Date() ;	// [GMT] time according to machine clock

	var startDST = new Date(dt.getFullYear(), 3, 1) ;
	while (startDST.getDay() != 0)
		startDST.setDate(startDST.getDate() + 1) ;

	var endDST = new Date(dt.getFullYear(), 9, 31) ;
	while (endDST.getDay() != 0)
		endDST.setDate(endDST.getDate() - 1) ;

	var ds_active ;		// DS currently active
	if (startDST < dt && dt < endDST)
		ds_active = 1 ;
	else
		ds_active = 0 ;

	// Adjust each clock offset if that clock has DS and in DS.
	for(n=0 ; n<ct.length ; n++)
		if (ct[n].ds == 1 && ds_active == 1) ct[n].os++ ;

	// compensate time zones
	gmdt = new Date() ;
	for (n=0 ; n<ct.length ; n++)
		ct[n].ct = new Date(gmdt.getTime() + ct[n].os * 3600 * 1000) ;

	//document.all.Clock0.innerHTML =
	//	'<font color="' + ct[0].cl + '">' + ct[0].tz + ClockString(ct[0].ct) + '</font>' ;

	document.all.Clock0.innerHTML =
		ct[0].tz + ClockString(ct[0].ct) ;


	
	timerID = window.setTimeout("UpdateClocks()", 1001) ;
}

function ClockString(dt)
{
	var stemp, ampm ;

	var dt_year = dt.getUTCFullYear() ;
	var dt_month = dt.getUTCMonth() + 1 ;
	var dt_day = dt.getUTCDate() ;
	var dt_hour = dt.getUTCHours() ;
	var dt_minute = dt.getUTCMinutes() ;
	var dt_second = dt.getUTCSeconds() ;
	
	dt_year = dt_year.toString() ;
	formatMonth(dt_month);
	
	if (0 <= dt_hour && dt_hour < 12)
	{
		ampm = 'AM' ;
		if (dt_hour == 0) dt_hour = 12 ;		
	} else {
		ampm = 'PM' ;
		dt_hour = dt_hour - 12 ;
		if (dt_hour == 0) dt_hour = 12 ;		
	}
	
	if (dt_minute < 10)
		dt_minute = '0' + dt_minute ;
	
	if (dt_second < 10)
		dt_second = '0' + dt_second ;

	//stemp = dt_month + '/' + dt_day + '/' + dt_year.substr(2,2) ;
	stemp = dt_day + ' ' + strMonth + ' ' + dt_year.substr(2,2) ;
	
	stemp = stemp + ', ' + dt_hour + ":" + dt_minute + ":" + dt_second + ' ' + ampm ;
	return stemp ;
}

function formatMonth(dt_month) {
	
	if (parseInt(dt_month) == 1) {
		strMonth = "Jan";
	}

	if (parseInt(dt_month) == 2) {
		strMonth = "Feb";
	}

	if (parseInt(dt_month) == 3) {
		strMonth = "Mar";
	}

	if (parseInt(dt_month) == 4) {
		strMonth = "Apr";
	}

	if (parseInt(dt_month) == 5) {
		strMonth = "May";
	}

	if (parseInt(dt_month) == 6) {
		strMonth = "Jun";
	}

	if (parseInt(dt_month) == 7) {
		strMonth = "Jul";
	}

	if (parseInt(dt_month) == 8) {
		strMonth = "Aug";
	}

	if (parseInt(dt_month) == 9) {
		strMonth = "Sept";
	}


	if (parseInt(dt_month) == 10) {
		strMonth = "Oct";
	}

	if (parseInt(dt_month) == 11) {
		strMonth = "Nov";
	}

	if (parseInt(dt_month) == 12) {
		strMonth = "Dec";
	}

}