sfHover = function() {
        var reg = /empty/;
        var sfEls = document.getElementById("t_menu").getElementsByTagName("div");
        for (var i=0; i<sfEls.length; i++) {
           if ( ! reg.test(sfEls[i].className) ) {
                sfEls[i].onmouseover=function() {
                        this.className+=" over";
                }
                sfEls[i].onmouseout=function() {
                        this.className=this.className.replace(" over", "");
                }
           }
        }
}
sfHover();