function hideTab(lnkName, divName)
{
    var div = $get(divName);
    div.style.display = "none";
    var lnk = $get(lnkName);
    lnk.className = "unselected";
}

function showTab(lnkName, divName)
{
    var div = $get(divName);
    div.style.display = "block";
    var lnk = $get(lnkName);
    lnk.className = "selected";
}