function changeRowColor(tableRow, hovering) {    
    if (hovering) {
        $(tableRow).addClassName('ajaxtable_hover');
    }
    else {
        $(tableRow).removeClassName('ajaxtable_hover');
    }
}

function showAjaxTableLoading(tablename) {
    Position.clone($(tablename), $('ajaxtableloading'));
    $('ajaxtableloading').show();
}

function hideAjaxTableLoading(tablename) {
    $('ajaxtableloading').hide();
}