function unfold(obj1,obj2,obj3,obj4) {
	var el = document.getElementById(obj1);
	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}
	else {
		el.style.display = '';
	}
        el = document.getElementById(obj2);
	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}
        el = document.getElementById(obj3);
	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}
        el = document.getElementById(obj4);
	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}
}