$(document).ready(function() {
    $("#menuHolder a img").mouseover(function() {
        if (this.src.indexOf('_up') != -1) {
            this.origPath = this.src;
            this.src = this.src.split("_up").join("_selected");

        }
        else this.origPath = this.src;


    });

    $("#menuHolder a img").mouseout(function() {
        if (this.src.indexOf('_selected') != -1) {
            if (this.origPath && this.origPath.indexOf("_selected") == -1) {
                this.src = this.src.split("_selected").join("_up");
            }
        }
    });

});