function updateLevelDisplay( level ) {
    for( var i=1; i<=3; i++) {
        var cb = $(document.getElementById('booklevel' + i));
        var imgObj = cb.next('label').children('img').get(0);
        if ( i == level ) {
            //imageSwap(document.getElementById('booklevel' + i + '_img'), 's');
            imageSwap(imgObj, 's');
            cb.attr('checked','checked');
        } else {
            //imageSwap(document.getElementById('booklevel' + i + '_img'));
            imageSwap(imgObj);
            cb.removeAttr('checked');
        }
    }
}

function bookLevelCorners() {
    $(".bookcover").corner("9px");
    $(".booklevel").corner("9px");
    $(".booklevelsel").corner("9px");
}

$(window).ready(function() {
    var level = getLevelCookie();
    bookLevelCorners();
    updateLevelDisplay( level );
});