function showSection(id) {
		var divs = document.getElementsByTagName("div");
		for (var i=0; i<divs.length; i++) {
				if (divs[i].className.indexOf("section") == -1) continue;
				if (divs[i].getAttribute("id") != id) {
						divs[i].style.display = "none";
					} else {
							divs[i].style.display = "block";
						}
			}			
	}
	
function prepareInternalnav() {
		if (!document.getElementById("activities_nav") && !document.getElementById("staff_nav")) return false;
		if (document.getElementById("activities_nav")) {
			 var nav = document.getElementById("activities_nav");
		} else if (document.getElementById("staff_nav")) {
			 var nav = document.getElementById("staff_nav");
		} else {
			 return false;
		}
		var links = nav.getElementsByTagName("a");
		for (var i=0; i<links.length; i++) {	
				var sectionId = links[i].getAttribute("href").split("#")[1];
				if (!document.getElementById(sectionId)) continue;	
				document.getElementById(sectionId).style.display = "none";
				links[i].destination = sectionId;
				links[i].onmouseover = function() {
						showSection(this.destination);
						return false;
					}
			}
	}


addLoadEvent(prepareInternalnav);