function est(d){
	document.getElementById(d).style.visibility="visible";
	}
function net(d){
	document.getElementById(d).style.visibility="hidden";
	}
function show (objstr,nest){
	curObj = objstr;
	curNest = (nest) ? nest : null;
	getStyle(objstr,nest).visibility = "visible";
	active = true;
}
function hide (){
	getStyle(curObj,curNest).visibility = "hidden";
	active = false;
}