function tabSwitch(active, number, tab_prefix, content_prefix)
{
    for (var i=1; i < number+1; 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 = 'current';
}