function tabSwitch_2(active, number, tab_prefix, content_prefix)
{ 
    for (var i=1; i <= number; i++)
    { 
        document.getElementById(content_prefix+i).style.display = 'none';
        document.getElementById(tab_prefix+i).className = '';
    }
    document.getElementById(content_prefix+active).style.display = 'block';
    document.getElementById(tab_prefix+active).className = 'active';
}