function getObject(obj) {
	var theObj
	if (document.layers) {if (typeof obj == "string") {return document.layers[obj]} else {return obj}}
	if (document.all) {if (typeof obj == "string") {return document.all(obj).style} else {return obj.style}}
	if (document.getElementById) {if (typeof obj == "string") {return document.getElementById(obj).style} else {return obj.style}}
	return null
}

function show(showobj) {
	showobj.visibility = "visible"
}
function hide(hideobj) {
	hideobj.visibility = "hidden"
}

function showSub(ulId){
	show(getObject("sub_"+ulId)); 
}
function hideSub(ulId){
	hide(getObject("sub_"+ulId)); 
}