CSS: transition opacity on mouse-out?

Question

.item:hover {
        zoom: 1;
        filter: alpha(opacity=50);
        opacity: 0.5;
        -webkit-transition: opacity .15s ease-in-out;
        -moz-transition         


        

Answer 1

$(window).scroll(function() {    
    $('.logo_container, .slogan').css({
        "opacity" : ".1",
        "transition" : "opacity .8s ease-in-out"
    });
});

Check the fiddle: http://jsfiddle.net/2k3hfwo0/2/