var old_table_02 = '';
var is_opened  = 'none';

function toggle( table ) {

    table_obj = document.getElementById(table);
    is_opened = table_obj.style.display;

    if (old_table_02 != '') {
        old_table_obj = document.getElementById(old_table_02);
        old_table_obj.style.display = 'none';
    }

    if (old_table_02 != table || is_opened == 'none') {

        table_obj.style.display = 'block';
    }

    old_table_02 = table;
}