/*****************************************************
 * ypSlideOutMenu
 * http://ypslideoutmenus.sourceforge.net/
 * 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... 
 *
 * Licensed under AFL 2.0
 * http://www.opensource.org/licenses/afl-2.0.php
 *
 * Revised: 
 * - 08/29/2002 : added .hideAll()
 * - 04/15/2004 : added .writeCSS() to support more 
 *                than 30 menus.
 *
 * --youngpup--
 *****************************************************/

ypSlideOutMenu.Registry = [];
ypSlideOutMenu.aniLen = 250;
ypSlideOutMenu.hideDelay = 1000;
ypSlideOutMenu.minCPUResolution = 10;

// ===== 8/19 WK - NS4 onmouseout bug =====//
// after triggering an onmouseover event on a menu link
// a onmouseout event an another link that isn't succeeded by
// another mouseover event will trigger the hideMenu() function
// solved by tracking mouse coords and checking if mouse is still
// within the bounds of the menu


// ===== track mouse coords =====//
if (document.layers) {
	var x, y;									// 8/19 WK
	document.captureEvents(Event.MOUSEMOVE);		// 8/19 WK
	document.onmousemove = getPosition;			// 8/19 WK
}

// constructor
function ypSlideOutMenu(id, dir, left, top, width, height)
{
	this.ie  = document.all ? 1 : 0;
	this.ns4 = document.layers ? 1 : 0;
	this.dom = document.getElementById ? 1 : 0;
	this.css = "";

	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.dim		 = this.orientation == "h" ? width : height;
		this.hideTimer	 = false;
		this.aniTimer	 = false;
		this.open		 = false;
		this.over		 = false;
		this.startTime	 = 0;

		// global reference to this object
		this.gRef = "ypSlideOutMenu_"+id;
		eval(this.gRef+"=this");

		// add this menu object to an internal list of all menus
		ypSlideOutMenu.Registry[id] = this;

		var d = document;

		var strCSS = "";
		strCSS += '#' + this.id + 'Container { visibility:hidden; '
		strCSS += 'left:' + left + 'px; '
		strCSS += 'top:' + top + 'px; '
		strCSS += 'overflow:hidden; z-index:10000; }'
		strCSS += '#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; '
		strCSS += 'width:' + width + 'px; '
		strCSS += 'height:' + height + 'px; '
		strCSS += 'clip:rect(0 ' + width + ' ' + height + ' 0); '
		strCSS += '}'

		this.css = strCSS;

		this.load();
	}
}

ypSlideOutMenu.writeCSS = function() {
	document.writeln('<style type="text/css">');

	for (var id in ypSlideOutMenu.Registry) {
		document.writeln(ypSlideOutMenu.Registry[id].css);
	}

	document.writeln('</style>');
}

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 (link) obj.setMenuPosition(link);	// 11/3 WK
	
	if (obj.container) {
		obj.over = true;

		// close other menus.
		for (menu in reg) { if (id != menu) { ypSlideOutMenu.hide(menu); }}

		// if this menu is scheduled to close, cancel it.
		if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer); }

		// if this menu is closed, open it.
		if (!obj.open && !obj.aniTimer) reg[id].startSlide(true);
	}
}

ypSlideOutMenu.hideMenu = function(id) {
	// schedules the menu to close after <hideDelay> ms, which
	// gives the user time to cancel the action if they accidentally moused out
	var obj = ypSlideOutMenu.Registry[id];
	if (obj.container) {
		if (obj.ns4) if (!obj.inMenu(id)) return false;	// 8/19 WK
		if (obj.hideTimer) window.clearTimeout(obj.hideTimer);
		obj.hideTimer = window.setTimeout("ypSlideOutMenu.hide('" + id + "')", ypSlideOutMenu.hideDelay);
	}
}

// ===== 8/19 WK - check if mouse is still in menu ===== //
ypSlideOutMenu.prototype.inMenu = function(id) {
	var obj = ypSlideOutMenu.Registry[id];
	if (x < obj.left || x > (obj.left + obj.width) || y < obj.top || y > (obj.top + obj.height)) return true; else return false;
}

// ===== 8/19 WK - put mouse coords in global var ===== //
function getPosition(e) {
	x = e.pageX;
	y = e.pageY;
	//status = x + ', ' + y;
}

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);
	
	// flag that this scheduled event has occured.
	obj.hideTimer = 0;

	// if this menu is open, close it.
	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);
	if (this.ie || this.dom) this.setSelectList();	// WK 12/22 invoke show/hide select list function
	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]);
}

// ===== 11/3 WK Set Menu Position ===== //
/*
ypSlideOutMenu.prototype.setMenuPosition = function(link) {	
	var topnavImg = document.images[this.img];
	var offsetTrail = topnavImg;
	var offsetLeft = 0;
	var offsetTop = 0;

	while (offsetTrail) {
		offsetLeft += offsetTrail.offsetLeft;
		offsetTop += offsetTrail.offsetTop;
		offsetTrail = offsetTrail.offsetParent;
	}

	if (this.ns4) {
		this.left = link.x;
		this.top = link.y;
		document.layers[this.id + 'Container'].left = link.x + this.offsetLeft;
		document.layers[this.id + 'Container'].top = link.y + this.offsetTop;
	} else {
		document.getElementById(this.id + 'Container').style.left = offsetLeft + this.offsetLeft + 'px';
		document.getElementById(this.id + 'Container').style.top = offsetTop + topnavImg.height + this.offsetTop + 'px';
	}
}
*/

// ===== 12/22 WK - show/hide select lists ===== //
ypSlideOutMenu.prototype.setSelectList = function() {
	var state = 'visible';
	for (var menu in ypSlideOutMenu.Registry) {
		if (ypSlideOutMenu.Registry[menu].open) state = 'hidden';
		for (var i = 0; i < document.forms.length; ++i) {
			for (var j = 0; j < document.forms[i].elements.length; ++j) {
				if (document.forms[i].elements[j].type == 'select-one') document.forms[i].elements[j].style.visibility = state;
			}
		}
	}
}

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