var mastertabvar = new Object()
mastertabvar.baseopacity = 0
mastertabvar.browserdetect = ""

function showsubmenu(masterid, id) {
	if (typeof highlighting != "undefined")
		clearInterval(highlighting)
	submenuobject = document.getElementById(id)
	mastertabvar.browserdetect = submenuobject.filters ? "ie"
			: typeof submenuobject.style.MozOpacity == "string" ? "mozilla"
					: ""
	hidesubmenus(mastertabvar[masterid])
	submenuobject.style.display = "block"
	instantset(mastertabvar.baseopacity)
	highlighting = setInterval("gradualfade(submenuobject)", 50)
}

function hidesubmenus(submenuarray) {
	for ( var i = 0; i < submenuarray.length; i++)
		document.getElementById(submenuarray[i]).style.display = "none"
}

function instantset(degree) {
	if (mastertabvar.browserdetect == "mozilla")
		submenuobject.style.MozOpacity = degree / 100
	else if (mastertabvar.browserdetect == "ie")
		submenuobject.filters.alpha.opacity = degree
}

function gradualfade(cur2) {
	if (mastertabvar.browserdetect == "mozilla" && cur2.style.MozOpacity < 1)
		cur2.style.MozOpacity = Math.min(
				parseFloat(cur2.style.MozOpacity) + 0.1, 0.99)
	else if (mastertabvar.browserdetect == "ie"
			&& cur2.filters.alpha.opacity < 100)
		cur2.filters.alpha.opacity += 10
	else if (typeof highlighting != "undefined") // fading animation over
		clearInterval(highlighting)
}

function initalizetab(tabid) {
	mastertabvar[tabid] = new Array()
	var menuitems = document.getElementById(tabid).getElementsByTagName("li")
	for ( var i = 0; i < menuitems.length; i++) {
		if (menuitems[i].getAttribute("rel")) {
			menuitems[i].setAttribute("rev", tabid) // associate this submenu
													// with main tab
			mastertabvar[tabid][mastertabvar[tabid].length] = menuitems[i]
					.getAttribute("rel") // store ids of submenus of tab menu
			if (menuitems[i].className == "active")
				showsubmenu(tabid, menuitems[i].getAttribute("rel"))
			menuitems[i].getElementsByTagName("a")[0].onmouseover = function() {
				showsubmenu(this.parentNode.getAttribute("rev"),
						this.parentNode.getAttribute("rel"))
			}
		}
	}
}