function startHover(e) {
    $('#lf-'+$(this).attr('id')).fadeIn();
}

function endHover(e) {
    $('#lf-'+$(this).attr('id')).fadeOut();
}

function cbSetup() {
    $('div.lfnav, div.lfnavlogo').mouseenter(startHover).mouseleave(endHover);
}

$(document).ready(cbSetup);