$(document).ready(function(){
    var speedContentSlide = 100;
    //add default select item
    var url = document.location.href;
    var findSelect = url.search('&select');
    if(findSelect > -1) {
        var cat = url.split("&select=")[1];
        var catlower = cat.toLowerCase();
        $('#menuContent_'+catlower).attr('class', 'SelectMenu');
        enableHover( $('#menuContent_'+catlower) );
    }else {
        $('.menuContent_item:first a img').attr('class', 'SelectMenu');
        enableHover($('.menuContent_item:first a img'));
    }
    /* menu content */
    $('.menuContent_item a img').hover(function() {
         if(!$(this).hasClass('SelectMenu'))
            enableHover($(this));
    }, function() {
        if(!$(this).hasClass('SelectMenu'))
            disableHover($(this));
        //menucontent_presentation
    });
    $(".menuContent_item a").click(function() {
        //alert(this+" img");
        var id = $(this).children('img').attr('id').split('_')[1];
        //close display text item(s)
        $('#cybook_content_items').children('div:visible').fadeOut(speedContentSlide, function() {
                 //hide previous selected menu element
                disableSelect();
                //show the newest selected menu element
                var newest = $("#menuContent_"+id);
                newest.attr('class', 'SelectMenu');
                enableHover(newest);
                //show the newest
                $("#cybook_content_"+id).fadeIn(speedContentSlide)
            });
    });
    function disableSelect() {
        var old = $(".menuContent_item a img.SelectMenu");
        if(old) {
            old.removeClass('SelectMenu');
            disableHover(old);
        }
    }
});