function set_top_nav_width() {
	var sfEls = document.getElementById("top_nav").getElementsByTagName("LI");
	var sfSubEls = null;
	for (var i=0; i<sfEls.length; i++) {
    if (sfEls[i].className.indexOf("parent") != -1) {
      sfSubEls=sfEls[i].getElementsByTagName("TABLE");
      for (var x=0; x<sfSubEls.length; x++) {
        if ((sfSubEls[x].className.indexOf("sublvl") != -1) && (sfSubEls[x].offsetWidth <= sfEls[i].offsetWidth)) {
          sfSubEls[x].style.width=sfEls[i].offsetWidth+20+"px";
        }
      }
    }
	}
}