function expandCollapse(element) {
	var parent = element.parentNode.parentNode
	var navsub
	for(var i=0;i<parent.childNodes.length;i++) {
		if(parent.childNodes[i].className == "navsub") {navsub=parent.childNodes[i]}
	}
	
	if(navsub) {
		if(navsub.style.display=="block") {navsub.style.display="none"}
		else {navsub.style.display="block"}
	}
}