var strCurNav = "";
function initMainNavigation() {
	arrMainNav = document.getElementById("top-navigation").getElementsByTagName("a");
	for (var i=0;i<arrMainNav.length;i++) {
		if (arrMainNav[i].className=="active") {
			strCurNav = arrMainNav[i].id;
			document.getElementById(arrMainNav[i].id + "-subnav").style.display = "block";
		}
		arrMainNav[i].onmouseover = function() {
			if (this.id != strCurNav) {
				document.getElementById(strCurNav + "-subnav").style.display = "";
				document.getElementById(strCurNav).className = "";
				strCurNav = this.id;
				document.getElementById(strCurNav + "-subnav").style.display = "block";
				document.getElementById(strCurNav).className = "active";
			}
		}
	}
}
initMainNavigation();