$(function(){
    $(".categorybox").hover(function(){
        $(this).css("z-index","5");
        $(this).find(".toolbox").stop().animate({left: "165", opacity:1}, {duration: "fast"}).css("display","block");
    }, function() {
        $(this).css("z-index","");
        $(this).find(".toolbox").stop().animate({left: "0", opacity: 0}, "fast").css("display","none");
    });
});