function openWin(URL){
	window.open(URL,'extra','toolbar=no,directories=no,height=700,width=750,location=no,menubar=no,resizable=yes,scrollbars=yes,status=no,left=-80,top=80');
}

function openWinWide(URL){
	window.open(URL,'extra','toolbar=no,directories=no,height=800,width=800,location=yes,menubar=no,resizable=yes,scrollbars=yes,status=no');
}

function openWinWidest(URL){
	window.open(URL,'extra','toolbar=no,directories=no,height=600,width=900,location=yes,menubar=no,resizable=yes,scrollbars=yes,status=no');
}

var Sessions = new Array('SessionI','SessionII','SessionIII','SessionIV','SessionV');
var Expanded = new Boolean(false);
var iSession=99;

function hide(obj){
	document.getElementById(obj).style.display="none";
}
function HideAll() {
	for (i=0; i < Sessions.length; i++) {
		hide(Sessions[i]);
	}
}
function HideMost(Session) {
	for (i=0; i < Sessions.length; i++) {
		if (Session != Sessions[i])	hide(Sessions[i])
		else if (Expanded == true) {
			if (iSession == i) {
				hide(Sessions[i]);
				Expanded=false;
			} else {
				show(Sessions[i]);
				iSession = i;
				Expanded=true;
			}
		} else {
			show(Sessions[i]);
			iSession = i;
			Expanded=true;
		}
	}
}
function show(obj){
	document.getElementById(obj).style.display="block";
}