function sn_init() {

	var subNavs = getElementsByClass("subNav", document, "ul");

	for (var i = 0, m = subNavs.length; i < m; i++) {

		subNavs[i].style.display = "none";		
		
		subNavs[i].parentNode.onmouseover = function() {

			this.getElementsByTagName("ul")[0].style.display = "block";

		}
		subNavs[i].parentNode.onmouseout = function() {

			this.getElementsByTagName("ul")[0].style.display = "none";

		}


	}

}
sn_init();