function select_all_checkboxes(_chck) {
	var fields = document.getElementsByTagName("INPUT");
	var _lb = document.getElementById("lb_selAll");
	var count = 0;

	for (var i = 0; i < fields.length; ++i) {
		if (fields[i].type == "checkbox") {
			fields[i].checked = (_chck == true);
			++count;
		}
	}

	if (_chck)
		_lb.innerHTML = _lb.innerHTML.replace("Seleziona", "Deseleziona");
	else
		_lb.innerHTML = _lb.innerHTML.replace("Deseleziona", "Seleziona");
	return count;
}

function flip_figli(aId) {
	if (! aId) return;
	var _d1 = document.getElementById('sfCont_'+aId);
	var _i1 = document.getElementById('isw_'+aId);

	if ((_d1.style.visibility == 'hidden') || (_d1.style.visibility == '')) {
		with (_d1.style) {
			visibility	= 'visible';
			display		= 'block';
		}
		_i1.src = _i1.src.replace('-giu', '-su');
	} else {
		with (_d1.style) {
			visibility	= 'hidden';
			display		= 'none';
		}
		_i1.src = _i1.src.replace('-su', '-giu');
	}
	
	
	return undefined;
}