function showSubmenu() {
	if (navigator.appVersion.indexOf("MSIE") ==-1) {
		document.getElementById('nav_ratings').className = "nav_ratings_show";
	}
}
function hideSubmenu() {
	if (navigator.appVersion.indexOf("MSIE") ==-1) {
		document.getElementById('nav_ratings').className = "nav_ratings_hide";
	}
}