//DD Tab Menu- Script rewritten April 27th, 07: http://www.dynamicdrive.com
//**Updated Feb 23rd, 08): Adds ability for menu to revert back to default selected tab when mouse moves out of menu

//Only 2 configuration variables below:

var ddtabmenu = {
	disabletablinks: false, //Disable hyperlinks in 1st level tabs with sub contents (true or false)?
	snap2original: [true, 300], //Should tab revert back to default selected when mouse moves out of menu? ([true/false, delay_millisec]

	currentpageurl: window.location.href.replace("http://" + window.location.hostname, "").replace(/^\//, ""), //get current page url (minus hostname, ie: http://www.dynamicdrive.com/)

	definemenu: function(tabid, dselected) {
		this[tabid + "-menuitems"] = null
		this[tabid + "-dselected"] = -1
		this.addEvent(window, function() { ddtabmenu.init(tabid, dselected) }, "load")
	},

	showsubmenu: function(tabid, targetitem) {
		var menuitems = this[tabid + "-menuitems"]
		this.clearrevert2default(tabid)
		for (i = 0; i < menuitems.length; i++) {
			menuitems[i].className = ""
			if (typeof menuitems[i].hasSubContent != "undefined")
				document.getElementById(menuitems[i].getAttribute("rel")).style.display = "none"
		}
		targetitem.className = "current"
		if (typeof targetitem.hasSubContent != "undefined")
			document.getElementById(targetitem.getAttribute("rel")).style.display = "block"
	},

	isSelected: function(menuurl) {
		var menuurl = menuurl.replace("http://" + menuurl.hostname, "").replace(/^\//, "")
		return (ddtabmenu.currentpageurl == menuurl)
	},

	isContained: function(m, e) {
		var e = window.event || e
		var c = e.relatedTarget || ((e.type == "mouseover") ? e.fromElement : e.toElement)
		while (c && c != m) try { c = c.parentNode } catch (e) { c = m }
		if (c == m)
			return true
		else
			return false
	},

	revert2default: function(outobj, tabid, e) {
		if (!ddtabmenu.isContained(outobj, tabid, e)) {
			window["hidetimer_" + tabid] = setTimeout(function() {
				ddtabmenu.showsubmenu(tabid, ddtabmenu[tabid + "-dselected"])
			}, ddtabmenu.snap2original[1])
		}
	},

	clearrevert2default: function(tabid) {
		if (typeof window["hidetimer_" + tabid] != "undefined")
			clearTimeout(window["hidetimer_" + tabid])
	},

	addEvent: function(target, functionref, tasktype) { //assign a function to execute to an event handler (ie: onunload)
		var tasktype = (window.addEventListener) ? tasktype : "on" + tasktype
		if (target.addEventListener)
			target.addEventListener(tasktype, functionref, false)
		else if (target.attachEvent)
			target.attachEvent(tasktype, functionref)
	},

	init: function(tabid, dselected) {
		var menuitems = document.getElementById(tabid).getElementsByTagName("a")
		this[tabid + "-menuitems"] = menuitems
		for (var x = 0; x < menuitems.length; x++) {
			if (menuitems[x].getAttribute("rel")) {
				this[tabid + "-menuitems"][x].hasSubContent = true
				if (ddtabmenu.disabletablinks)
					menuitems[x].onclick = function() { return false }
				if (ddtabmenu.snap2original[0] == true) {
					var submenu = document.getElementById(menuitems[x].getAttribute("rel"))
					menuitems[x].onmouseout = function(e) { ddtabmenu.revert2default(submenu, tabid, e) }
					submenu.onmouseover = function() { ddtabmenu.clearrevert2default(tabid) }
					submenu.onmouseout = function(e) { ddtabmenu.revert2default(this, tabid, e) }
				}
			}
			else //for items without a submenu, add onMouseout effect
				menuitems[x].onmouseout = function(e) { this.className = ""; if (ddtabmenu.snap2original[0] == true) ddtabmenu.revert2default(this, tabid, e) }
			menuitems[x].onmouseover = function() { ddtabmenu.showsubmenu(tabid, this) }
			if (dselected == "auto" && typeof setalready == "undefined" && this.isSelected(menuitems[x].href)) {
				ddtabmenu.showsubmenu(tabid, menuitems[x])
				this[tabid + "-dselected"] = menuitems[x]
				var setalready = true
			}
			else if (parseInt(dselected) == x) {
				ddtabmenu.showsubmenu(tabid, menuitems[x])
				this[tabid + "-dselected"] = menuitems[x]
			}
		}
	}
}