//enter limit in "minutes:seconds" Minutes should range from 0 to infinity. Seconds should range from 0 to 59
var limit="120:00"
if (document.images){
	var parselimit=limit.split(":")
	parselimit=parselimit[0]*60+parselimit[1]*1
}

function begintimer(){
	if (!document.images)
		return
	if (parselimit<=0)
		window.location="sys/logout.php"
	else {
		
		parselimit-=600
		curmin=Math.floor(parselimit/60)
		cursec=parselimit%60
		if (curmin!=0)
			curtime=curmin+" minutes and "+cursec+" seconds left"
		else
			curtime=cursec+" seconds left"
		window.status=curtime
		setTimeout("begintimer()",600000)
	}
}