YUI().use("node", "event", function (Y) {

    Y.on("domready", init);

    function init() {

        var itemHolder = Y.one(".items");
        var items = itemHolder.all("a");

        var mouseOver = function (e) {
            e.currentTarget.one("img").setStyle("display", "block");
        };
        var mouseOut = function (e) {
            e.currentTarget.one("img").setStyle("display", "none");
        };
        
        items.on('mouseover', mouseOver);
        items.on('mouseout', mouseOut);
        
    }

});