function flipTab(tab_set, tab_count, actv_tabid)
{
    var tab_area;
    var tab;
    var actv_tab = document.getElementById(tab_set + "_tab" + actv_tabid);
    var actv_tabarea = document.getElementById(tab_set + "_tabarea" + actv_tabid);
    
    for (var i = 1; i <= tab_count; i++)
    {
        tab_area = document.getElementById(tab_set + "_tabarea" + i);
        tab      = document.getElementById(tab_set + "_tab" + i);
        
        tab_area.style.display = "none";
        tab.className = "";
    }

    actv_tabarea.style.display = "block";
    actv_tab.className = "tabset_" + tab_set + "_ontab";
}