function showPic (whichpic) {
	
	// reset rollovers to inactive state
	var menucontainer = document.getElementById("column");
	var menulist = menucontainer.getElementsByTagName("ul");
	for (var e=0; e < menulist.length; e++) {
		if (menulist[e].className == "navsecondary") {

			var rolloverOff = menulist[e].getElementsByTagName("img");
			for ( var i=0; i < rolloverOff.length; i++) {
				rolloverOff[i].className = 'inactive';
			}
		}
	}
		
	var menuimage = whichpic.getElementsByTagName("img");
	for (var i=0; i < menuimage.length; i++) {
		menuimage[i].className = 'active';
		return false;
	}
		
}
function hidePic (whichpic) {
	
	// reset rollovers to inactive state
	var menucontainer = document.getElementById("column");
	var menulist = menucontainer.getElementsByTagName("ul");
	for (var e=0; e < menulist.length; e++) {
		if (menulist[e].className == "navsecondary") {

			var rolloverOff = menulist[e].getElementsByTagName("img");
			for ( var i=0; i < rolloverOff.length; i++) {
				rolloverOff[i].className = 'inactive';
			}
		}
	}
	return false;
}
function prepareRollover() {
  if (!document.getElementsByTagName) return false;
  if (!document.getElementById) return false;
  if (!document.getElementById("column")) return false;
	var menucontainer = document.getElementById("column");
	var menulist = menucontainer.getElementsByTagName("ul");
	for (var e=0; e < menulist.length; e++) {
		if (menulist[e].className == "navsecondary") {
			var links = menulist[e].getElementsByTagName("a");
			for (var i=0; i < links.length; i++) {
				links[i].onmouseover = function() {
					return showPic(this);
				}
			}
			for ( var i=0; i < links.length; i++) {
				links[i].onmouseout = function() {
					return hidePic(this);
				}
			}
		}
	}
}
/*
addEvent function from http://www.quirksmode.org/blog/archives/2005/10/_and_the_winner_1.html
*/
function addEvent (obj, type, fn) {
	if (obj.addEventListener)
		obj.addEventListener(type, fn, false);
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() {obj["e"+type+fn]( window.event );}
		obj.attachEvent("on"+type, obj[type+fn]);
	}
}

addEvent(window, 'load', prepareRollover);