$(document).ready(function(){
    $("div.menuItem").hover(function(){
        $(this).find("img.menuItem").fadeTo("fast", 1.0); // This should set the opacity to 100% on hover
        },function(){
        $(this).find("img.menuItem").fadeTo("fast", 0.6); // This should set the opacity back to 60% on mouseout
    });
});