function initPage() {
	if(!document.getElementById) return;
	hideBoxes();
	dropDowns();
}

function hideBoxes() {
	// hide unused boxes
	var boxes = document.getElementsByClassName('box');
	if(boxes.length == 0) return;
	for(var n = 0; n < boxes.length; n++) {
		var p = boxes[n].getElementsByTagName('p'); 
		if(p.length == 0) boxes[n].style.display = 'none';
	}
}

function dropDowns() {
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById("topnav");
		navLIs = navRoot.getElementsByTagName("li");
		for (i=0; i<navLIs.length; i++) {
			node = navLIs[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className+=" over";
				}
				node.onmouseout=function() {
					this.className=this.className.replace(" over", "");
				}
			}
		}
	}
}



Event.observe(window, "load", initPage);