function changeDisplayStyle(id, value) {
	document.getElementById(id).style.display = value;
}

function showMenu( whichMenu, submenu ) {
  if (submenu) {
    changeDisplayStyle(whichMenu.parentNode.parentNode.id, "block");
  } else {
    changeDisplayStyle('sub_' + whichMenu.id, "block");
  }
	return false;
	}

function hideMenu( whichMenu, submenu ) {
  if (submenu) {
    changeDisplayStyle(whichMenu.parentNode.parentNode.id, "none");
  } else {
    changeDisplayStyle('sub_' + whichMenu.id, "none");
  }
	return false;
}

sfHover = function() {
	if (document.getElementById("firm") ) {
		var sfEls = document.getElementById("firm").getElementsByTagName("LI");
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=" sfhover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			}
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);