TransMenu.spacerGif = "x.gif";                     // path to a transparent spacer gif
TransMenu.dingbatOn = "submenu-on.gif";            // path to the active sub menu dingbat
TransMenu.dingbatOff = "submenu-off.gif";          // path to the inactive sub menu dingbat
TransMenu.dingbatSize = 5;                            // size of the dingbat (square shape assumed)
TransMenu.menuPadding = 0;                             // padding between menu border and items grid
TransMenu.itemPadding = 3;                             // additional padding around each item
TransMenu.shadowSize = 3;                              // size of shadow under menu
TransMenu.shadowOffset = 3;                            // distance shadow should be offset from leading edge
TransMenu.shadowColor = "#888";                        // color of shadow (transparency is set in CSS)
TransMenu.shadowPng = "grey-40.png";               // a PNG graphic to serve as the shadow for mac IE5
TransMenu.backgroundColor = "#9EAA36";                   // color of the background (transparency set in CSS)
TransMenu.backgroundPng = "white-90.png";          // a PNG graphic to server as the background for mac IE5
TransMenu.hideDelay = 500;                            // number of milliseconds to wait before hiding a menu
TransMenu.slideTime = 300;      


//==================================================================================================
// Internal use properties
//==================================================================================================
TransMenu.reference = {topLeft:1,topRight:2,bottomLeft:3,bottomRight:4};
TransMenu.direction = {down:1,right:2};
TransMenu.registry = [];
TransMenu._maxZ = 100;

TransMenu.updateImgPath = function (imgPath){
	TransMenu.spacerGif = imgPath + TransMenu.spacerGif;
	TransMenu.dingbatOn = imgPath + TransMenu.dingbatOn;
	TransMenu.dingbatOff = imgPath + TransMenu.dingbatOff;
	TransMenu.shadowPng = imgPath + TransMenu.shadowPng;
	TransMenu.backgroundPng = imgPath + TransMenu.backgroundPng;
}

//==================================================================================================
// Static methods
//==================================================================================================
// supporting win ie5+, mac ie5.1+ and gecko >= mozilla 1.0
TransMenu.isSupported = function() {
        var ua = navigator.userAgent.toLowerCase();
		var pf = navigator.platform.toLowerCase();
        var an = navigator.appName;
        var r = false;

        if (ua.indexOf("gecko") > -1 && navigator.productSub >= 20020605) r = true; // gecko >= moz 1.0
        else if (an == "Microsoft Internet Explorer") {
                if (document.getElementById) { // ie5.1+ mac,win
                        if (pf.indexOf("mac") == 0) {
							r = /msie (\d(.\d*)?)/.test(ua) && Number(RegExp.$1) >= 5.1;
						}
						else r = true;
                }
        }

        return r;
}

// call this in onload once menus have been created
TransMenu.initialize = function() {
        for (var i = 0, menu = null; menu = this.registry[i]; i++) {
                menu.initialize();
        }
}

// call this in document body to write out menu html
TransMenu.renderAll = function() {
        var aMenuHtml = [];
        for (var i = 0, menu = null; menu = this.registry[i]; i++) {
                aMenuHtml[i] = menu.toString();
        }
        document.write(aMenuHtml.join(""));
}


//==================================================================================================
// TransMenuSet
//==================================================================================================
// iDirection           : The direction to slide out. One of TransMenu.direction.
// iLeft                : Left pixel offset of menus from actuator
// iTop                 : Top pixel offset of menus from actuator
// iReferencePoint      : Corner of actuator to measure from. One of TransMenu.referencePoint.
//==================================================================================================
TransMenuSet.registry = [];

function TransMenuSet(iDirection, iRight, iTop, iReferencePoint) {
        // public methods
        this.addMenu = addMenu;
        this.showMenu = showMenu;
        this.hideMenu = hideMenu;
        this.hide = hide;
        this.hideCurrent = hideCurrent;

        // initialization
        var menus = [];
        var _this = this;
        var current = null;

        this.index = TransMenuSet.registry.length;
        TransMenuSet.registry[this.index] = this;

        // method implimentations...
        function addMenu(oActuator) {
                var m = new TransMenu(oActuator, iDirection, iRight, iTop, iReferencePoint, this);
                menus[menus.length] = m;
                return m;
        }

        function showMenu(oMenu) {
                if (oMenu != current) {
                        // close currently open menu
                        if (current != null) hide(current);        

                        // set current menu to this one
                        current = oMenu;

                        // if this menu is closed, open it
                        oMenu.show();
                }
                else {
                        // hide pending calls to close this menu
                        cancelHide(oMenu);
                }
        }

        function hideMenu(oMenu) {
                //dbg_dump("hideMenu a " + oMenu.index);
                if (current == oMenu && oMenu.isOpen) {
                        //dbg_dump("hideMenu b " + oMenu.index);
                        if (!oMenu.hideTimer) scheduleHide(oMenu);
                }
        }

        function scheduleHide(oMenu) {
                //dbg_dump("scheduleHide " + oMenu.index);
                oMenu.onqueue();
                oMenu.hideTimer = window.setTimeout("TransMenuSet.registry[" + _this.index + "].hide(TransMenu.registry[" + oMenu.index + "])", TransMenu.hideDelay);
        }

        function cancelHide(oMenu) {
                //dbg_dump("cancelHide " + oMenu.index);
                if (oMenu.hideTimer) {
						oMenu.ondequeue();
                        window.clearTimeout(oMenu.hideTimer);
                        oMenu.hideTimer = null;
                }
        }

        function hide(oMenu) {   
                if (!oMenu && current) oMenu = current;

                if (oMenu && current == oMenu && oMenu.isOpen) {
                        hideCurrent();
                }
        }

        function hideCurrent() {
				if (null != current) {
					cancelHide(current);
					current.hideTimer = null;
					current.hide();
					current = null;
				}
        }
}

//==================================================================================================
// TransMenuItem (internal)
// represents an item in a dropdown
//==================================================================================================
// sText        : The item display text
// sUrl         : URL to load when the item is clicked
// oParent      : Menu this item is a part of
//==================================================================================================
function TransMenuItem(sText, sUrl, oParent, browserNav, active) {
        this.toString = toString;
        this.text = sText;
        this.url = sUrl;
		this.browserNav = browserNav;
        this.parentMenu = oParent;
		this.active = active;

        function toString(bDingbat) {
                var sDingbat = bDingbat ? TransMenu.dingbatOff : TransMenu.spacerGif;
                var iEdgePadding = TransMenu.itemPadding + TransMenu.menuPadding;
                var sPaddingLeft = "padding:" + TransMenu.itemPadding + "px; padding-left:" + iEdgePadding + "px;"
                var sPaddingRight = "padding:" + TransMenu.itemPadding + "px; padding-right:" + iEdgePadding + "px;"
				var id = active?' id="active" ':'';
                return '<tr class="item"'+id+'><td nowrap style="' + sPaddingLeft + '">' + 
                        sText + '</td><td width="10" style="' + sPaddingRight + '">' + 
                        '<img src="' + sDingbat + '" width="5" height="5"></td></tr>';
        }
}

//=====================================================================
// Accel[erated] [an]imation object
// change a property of an object over time in an accelerated fashion
//=====================================================================
// obj  : reference to the object whose property you'd like to animate
// prop : property you would like to change eg: "left"
// to   : final value of prop
// time : time the animation should take to run
// zip	: optional. specify the zippiness of the acceleration. pick a 
//		  number between -1 and 1 where -1 is full decelerated, 1 is 
//		  full accelerated, and 0 is linear (no acceleration). default
//		  is 0.
// unit	: optional. specify the units for use with prop. default is 
//		  "px".
//=====================================================================
// bezier functions lifted from the lib_animation.js file in the 
// 13th Parallel API. www.13thparallel.org
//=====================================================================

function Accelimation(from, to, time, zip) {
	if (typeof zip  == "undefined") zip  = 0;
	if (typeof unit == "undefined") unit = "px";

        this.x0         = from;
        this.x1		= to;
	this.dt		= time;
	this.zip	= -zip;
	this.unit	= unit;
	this.timer	= null;
	this.onend	= new Function();
        this.onframe    = new Function();
}



//=====================================================================
// public methods
//=====================================================================

// after you create an accelimation, you call this to start it-a runnin'
Accelimation.prototype.start = function() {
	this.t0 = new Date().getTime();
	this.t1 = this.t0 + this.dt;
	var dx	= this.x1 - this.x0;
	this.c1 = this.x0 + ((1 + this.zip) * dx / 3);
	this.c2 = this.x0 + ((2 + this.zip) * dx / 3);
	Accelimation._add(this);
}

// and if you need to stop it early for some reason...
Accelimation.prototype.stop = function() {
	Accelimation._remove(this);
}



//=====================================================================
// private methods
//=====================================================================

// paints one frame. gets called by Accelimation._paintAll.
Accelimation.prototype._paint = function(time) {
	if (time < this.t1) {
		var elapsed = time - this.t0;
	        this.onframe(Accelimation._getBezier(elapsed/this.dt,this.x0,this.x1,this.c1,this.c2));
        }
	else this._end();
}

// ends the animation
Accelimation.prototype._end = function() {
	Accelimation._remove(this);
        this.onframe(this.x1);
	this.onend();
}




//=====================================================================
// static methods (all private)
//=====================================================================

// add a function to the list of ones to call periodically
Accelimation._add = function(o) {
	var index = this.instances.length;
	this.instances[index] = o;
	// if this is the first one, start the engine
	if (this.instances.length == 1) {
		this.timerID = window.setInterval("Accelimation._paintAll()", this.targetRes);
	}
}

// remove a function from the list
Accelimation._remove = function(o) {
	for (var i = 0; i < this.instances.length; i++) {
		if (o == this.instances[i]) {
			this.instances = this.instances.slice(0,i).concat( this.instances.slice(i+1) );
			break;
		}
	}
	// if that was the last one, stop the engine
	if (this.instances.length == 0) {
		window.clearInterval(this.timerID);
		this.timerID = null;
	}
}

// "engine" - call each function in the list every so often
Accelimation._paintAll = function() {
	var now = new Date().getTime();
	for (var i = 0; i < this.instances.length; i++) {
		this.instances[i]._paint(now);
	}
}


// Bezier functions:
Accelimation._B1 = function(t) { return t*t*t }
Accelimation._B2 = function(t) { return 3*t*t*(1-t) }
Accelimation._B3 = function(t) { return 3*t*(1-t)*(1-t) }
Accelimation._B4 = function(t) { return (1-t)*(1-t)*(1-t) }


//Finds the coordinates of a point at a certain stage through a bezier curve
Accelimation._getBezier = function(percent,startPos,endPos,control1,control2) {
	return endPos * this._B1(percent) + control2 * this._B2(percent) + control1 * this._B3(percent) + startPos * this._B4(percent);
}


//=====================================================================
// static properties
//=====================================================================

Accelimation.instances = [];
Accelimation.targetRes = 10;
Accelimation.timerID = null;


//=====================================================================
// IE win memory cleanup
//=====================================================================

if (window.attachEvent) {
	var cearElementProps = [
		'data',
		'onmouseover',
		'onmouseout',
		'onmousedown',
		'onmouseup',
		'ondblclick',
		'onclick',
		'onselectstart',
		'oncontextmenu'
	];

	window.attachEvent("onunload", function() {
        var el;
        for(var d = document.all.length;d--;){
            el = document.all[d];
            for(var c = cearElementProps.length;c--;){
                el[cearElementProps[c]] = null;
            }
        }
	});
}