/*****************************************************
* ypSlideOutMenu
* 3/04/2001
*
* a nice little script to create exclusive, slide-out
* menus for ns4, ns6, mozilla, opera, ie4, ie5 on 
* mac and win32. I've got no linux or unix to test on but 
* it should(?) work... 
*
* Revised:
* - 08/29/2002 : added .hideAll()
*
* --youngpup--
*
* Code from http://ypslideoutmenus.sourceforge.net/
* Quote from page: "It is offered completely free, for any purpose,
* under the Academic Free License."
*
* Revised by Mikko Noromaa:
* - 10/27/2005 : Cleaned formatting.
*****************************************************/
ypSlideOutMenu.Registry = []
ypSlideOutMenu.aniLen = 250
ypSlideOutMenu.hideDelay = 200
ypSlideOutMenu.minCPUResolution = 10

// constructor
function ypSlideOutMenu(id, dir)
{
	this.ie = document.all ? 1 : 0
	this.ns4 = document.layers ? 1 : 0
	this.dom = document.getElementById ? 1 : 0
	if (this.ie || this.ns4 || this.dom) {
		this.id = id
		this.dir = dir
		this.orientation = dir == "left" || dir == "right" ? "h" : "v"
		this.dirType = dir == "right" || dir == "down" ? "-" : "+"
		this.hideTimer = false
		this.aniTimer = false
		this.open = false
		this.over = false
		this.startTime = 0
		this.gRef = "ypSlideOutMenu_"+id
		eval(this.gRef+"=this")

		var m=document.getElementById(id);
		var left=0;
		for (el=m; el; el=el.offsetParent) left+=el.offsetLeft;
		left-=2;	// navi2_spacer.gif is in a TD 2 pixels to the left.
		var top=0;
		for (el=m; el; el=el.offsetParent) top+=el.offsetTop;
		top+=m.clientHeight-5;		// navi2_bg.gif contains 2 extra pixels below the bottom line and 2 white pixels above.

		var container=document.getElementById(id+'Container');
		if (container) {
			var width=container.clientWidth;
			var height=container.clientHeight;
			container.style.left=left+'px';
			container.style.top=top+'px';
			
			this.dim = this.orientation == "h" ? width : height
			ypSlideOutMenu.Registry[id] = this
			this.load()
		}
	}
}

ypSlideOutMenu.prototype.load = function()
{
	var d = document
	var lyrId1 = this.id + "Container"
	var lyrId2 = this.id + "Content"
	var obj1 = this.dom ? d.getElementById(lyrId1) : this.ie ? d.all[lyrId1] : d.layers[lyrId1]
	if (obj1) var obj2 = this.ns4 ? obj1.layers[lyrId2] : this.ie ? d.all[lyrId2] : d.getElementById(lyrId2)
	var temp
	if (!obj1 || !obj2) {
		window.setTimeout(this.gRef + ".load()", 100)
	}
	else {
		this.container = obj1
		this.menu = obj2
		this.style = this.ns4 ? this.menu : this.menu.style
		this.homePos = eval("0" + this.dirType + this.dim)
		this.outPos = 0
		this.accelConst = (this.outPos - this.homePos) / ypSlideOutMenu.aniLen / ypSlideOutMenu.aniLen 
		// set event handlers.
		if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
		this.menu.onmouseover = new Function("ypSlideOutMenu.showMenu('" + this.id + "')")
		this.menu.onmouseout = new Function("ypSlideOutMenu.hideMenu('" + this.id + "')")
		//set initial state
		this.endSlide()
	}
}

ypSlideOutMenu.showMenu = function(id)
{
	var reg = ypSlideOutMenu.Registry
	var obj = ypSlideOutMenu.Registry[id]
	if (obj.container) {
		obj.over = true
		for (menu in reg) if (id != menu) ypSlideOutMenu.hide(menu)
		if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer) }
		if (!obj.open && !obj.aniTimer) reg[id].startSlide(true)
	}
}

ypSlideOutMenu.hideMenu = function(id)
{
	var obj = ypSlideOutMenu.Registry[id]
	if (obj.container) {
		if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
		obj.hideTimer = window.setTimeout("ypSlideOutMenu.hide('" + id + "')", ypSlideOutMenu.hideDelay);
	}
}

ypSlideOutMenu.hideAll = function()
{
	var reg = ypSlideOutMenu.Registry
	for (menu in reg) {
		ypSlideOutMenu.hide(menu);
		if (menu.hideTimer) window.clearTimeout(menu.hideTimer);
	}
}

ypSlideOutMenu.hide = function(id)
{
	var obj = ypSlideOutMenu.Registry[id]
	obj.over = false
	if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
	obj.hideTimer = 0
	if (obj.open && !obj.aniTimer) obj.startSlide(false)
}

ypSlideOutMenu.prototype.startSlide = function(open)
{
	this[open ? "onactivate" : "ondeactivate"]()
	this.open = open
	if (open) this.setVisibility(true)
	this.startTime = (new Date()).getTime() 
	this.aniTimer = window.setInterval(this.gRef + ".slide()", ypSlideOutMenu.minCPUResolution)
}

ypSlideOutMenu.prototype.slide = function()
{
	var elapsed = (new Date()).getTime() - this.startTime
	if (elapsed > ypSlideOutMenu.aniLen) {
		this.endSlide()
	}
	else {
		var d = Math.round(Math.pow(ypSlideOutMenu.aniLen-elapsed, 2) * this.accelConst)
		if (this.open && this.dirType == "-") d = -d
		else if (this.open && this.dirType == "+") d = -d
		else if (!this.open && this.dirType == "-") d = -this.dim + d
		else d = this.dim + d
		this.moveTo(d)
	}
}

ypSlideOutMenu.prototype.endSlide = function()
{
	this.aniTimer = window.clearTimeout(this.aniTimer)
	this.moveTo(this.open ? this.outPos : this.homePos)
	if (!this.open) this.setVisibility(false)
	if ((this.open && !this.over) || (!this.open && this.over)) {
		this.startSlide(this.over)
	}
}

ypSlideOutMenu.prototype.setVisibility = function(bShow)
{ 
	var s = this.ns4 ? this.container : this.container.style
	s.visibility = bShow ? "visible" : "hidden"
}

ypSlideOutMenu.prototype.moveTo = function(p)
{ 
	this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px"
}

ypSlideOutMenu.prototype.getPos = function(c)
{
	return parseInt(this.style[c])
}

ypSlideOutMenu.prototype.onactivate = function() { }
ypSlideOutMenu.prototype.ondeactivate = function() { }