function RowVisible(riga,value)
{
	if(document.all)
	{	var table = document.all.scelta;
		target = table.rows[riga] ;	}
	else 
	{	var table = source.parentNode.parentNode.parentNode ;
		target = table.childNodes[riga] ;	}
	if (target && target.style)
	{	if (!(target.style.stato))	target.style.stato='';
		if (value)
		{	target.style.stato='open';
			target.style.display = '' ; }
		else
		{	target.style.stato='close';
			target.style.display = 'none' ; }	}
}
function SelGruppo(Gruppo)
{
	var table = document.all.scelta;
	for ( var i = 0; i < table.rows.length; i++ )
		if ( table.rows[i].id != '' ) RowVisible(table.rows[i].id,false);
	if (Gruppo == '')
		for ( var i = 0; i < table.rows.length; i++ )
			if ( table.rows[i].id != '' ) 
			{	RowVisible(table.rows[i].id,true);
				break;	}
	RowVisible(Gruppo,true);
}