/*****************************************************
* ypSlideOutParking
* 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()
* - 04/15/2004 : added .writeCSS() to support more 
*                than 30 menus.
*
* --youngpup--

*****************************************************/

ypSlideOutParking.Registry = [];
ypSlideOutParking.aniLen = 150;
ypSlideOutParking.hideDelay = 300;
ypSlideOutParking.minCPUResolution = 10;

// constructor
function ypSlideOutParking(id, dir, left, top, width, height)
{
	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.dim = this.orientation == "h" ? width : height;
		this.hideTimer = false;
		this.aniTimer = false;
		this.open = false;
		this.over = false;
		this.startTime = 0;
		this.gRef = "ypSlideOutParking_"+id;
		eval(this.gRef+"=this");
		ypSlideOutParking.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();
	}
} // end ypSlideOutParking.


ypSlideOutParking.writeCSS = function()
{
	document.writeln('<style type="text/css">');
	
	for (var id in ypSlideOutParking.Registry) 
	{ document.writeln(ypSlideOutParking.Registry[id].css); }
	
	document.writeln('</style>');
} // end writeCSS.


ypSlideOutParking.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) / ypSlideOutParking.aniLen / ypSlideOutParking.aniLen;
		
		// set event handlers.
		if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
		this.menu.onmouseover = new Function("ypSlideOutParking.showMenu('" + this.id + "')");
		this.menu.onmouseout = new Function("ypSlideOutParking.hideMenu('" + this.id + "')");
		
		//set initial state
		this.endSlide();
	}
} // end load.

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

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


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


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

ypSlideOutParking.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()", ypSlideOutParking.minCPUResolution);
} // end startSlide.

ypSlideOutParking.prototype.slide = function()
{
	var elapsed = (new Date()).getTime() - this.startTime;
	if (elapsed > ypSlideOutParking.aniLen) this.endSlide();
	else 
	{
		var d = Math.round(Math.pow(ypSlideOutParking.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);
	}
} // end slide.

ypSlideOutParking.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); }
} // end endSlide.

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

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

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

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