function returnObjById( id ) {
	if (document.getElementById) var returnVar = document.getElementById(id);
	else if (document.all) var returnVar = document.all[id];
	else if (document.layers) var returnVar = document.layers[id];
	return returnVar;
}

function getSelectedTab(){
	var obj = returnObjById("t" + 1);
	var PeriodCont = 2;
	while (obj != null){
		if (obj.className == "display_y") return obj;
		obj = returnObjById("t" + PeriodCont++);
	}
}

function SelectTab(TabID, Lclass) {
	var stab = returnObjById("t" + TabID), i = 1;
	var ltab = returnObjById("l" + TabID);
	stab.className = "display_y";
	ltab.className = Lclass + "_" + TabID +" tab_selected";
	obj = returnObjById("t"+1);
	lobj = returnObjById("l"+1);
	while (obj != null){
		if (TabID != i){
			obj.className = "display_n";
			lobj.className = Lclass + "_" + i;
		}
		i++;
		obj = returnObjById("t"+i);
		lobj = returnObjById("l"+i);
	}
	return false;
}