function clock(divId, addtime){

	timeObj = document.getElementById(divId);

	var thetime=new Date();

	dateArr = thetime.toGMTString().split(',');
	var dow = dateArr[0];
	dateArr = dateArr[1].split(' ');

	var dom = dateArr[1];
	var moy = dateArr[2];
	var yr = dateArr[3];

	timeArr = dateArr[4].split(':');

	var hours = timeArr[0];
	var mins = timeArr[1];
	var secs = timeArr[2];

	var timeStr = addtoTime(hours + ':' + mins + ':' + secs, addtime);

	if(timeObj) {
		timeObj.innerHTML = timeStr;
	}

	setTimeout("clock('" + divId + "', '" + addtime +"')",1000);
}

function converttime(){

	hours = document.convert.hh.value;
	mins = document.convert.mm.value;
	timez = document.convert.timezone.value;
	etimez = document.convert.etimezone.value;
	secs = 0;
	var timeStr = addtoTime(hours + ':' + mins + ':' + secs, timez);

	timeArr = timeStr.split(' ');
	spell = timeArr[1];
	ntimeArr = timeArr[0].split(':');

	gh = (spell == "PM") ? (parseInt(ntimeArr[0], 10) + 12) : ntimeArr[0];
	gm = ntimeArr[1];
	gs = ntimeArr[2];
	var timeStr = addtoTime(gh + ':' + gm + ':' + gs, etimez);

	document.convert.ctime.value = timeStr;
}

function intToStr(val, num) {
	var newVal = val + "";
	if(newVal.length < num){
		for(i=1; i<num; i++) {
			newVal = "0" + newVal;
		}
	}
	return newVal;
}

function addtoTime(curTime,timestr){
	var thetime=new Date();

	timeArr = timestr.split(':');
	curtimeArr = curTime.split(':');

	var hours = curtimeArr[0];
	var mins = curtimeArr[1];
	var secs = curtimeArr[2];


	var totalSecsToAdd = parseInt(timeArr[3], 10) + (parseInt(timeArr[2], 10)*60) + (parseInt(timeArr[1], 10)*3600);
	var totalSecsToday = parseInt(hours, 10)*3600 + parseInt(mins,10)*60 + parseInt(secs, 10);

	switch(timeArr[0]) {
		case "+":
			var totalSecs = totalSecsToday + totalSecsToAdd;
		break;

		case "-":
			var totalSecs = totalSecsToday - totalSecsToAdd;
		break;
	}

	var newSecs = totalSecs%60;
	var newMins = parseInt(totalSecs/60, 10);
	newMins = newMins%60;
	var newHours = parseInt(totalSecs/3600, 10);



	newHours = (newHours > 24) ? newHours - 24  : newHours;
	newHours = (newHours < 0) ? 24 + newHours : newHours;

	newHours  = (newMins < 0) ? newHours - 1 : newHours;

	newMins = (newMins < 0) ? 60 + newMins : newMins;


	var dayPart = ((newHours >= 12) && (newHours < 24)) ? "PM" : "AM";

	newHours = (newHours > 12) ? (newHours - 12) : newHours;

	newTime = intToStr(newHours,2) + ":" + intToStr(newMins,2) + ":" + intToStr(newSecs,2) + " " + dayPart;


	return newTime;


}
function startClock() {
	clock('intime', '+:05:30:00');
	clock('uktime', '+:1:00:00');
	clock('detime', '+:2:00:00');
}