//==================================================================================================

// Configuration properties

//==================================================================================================

mtDropDown.spacerGif = "imgs/1x1t.gif";                     // path to a transparent spacer gif

//mtDropDown.dingbatOn = "menu/seta.gif";          // path to the active sub menu dingbat

//mtDropDown.dingbatOff = "menu/seta.gif";         // path to the inactive sub menu dingbat

mtDropDown.dingbatSize = 1;                            // size of the dingbat (square shape assumed)

mtDropDown.menuPadding = 7;                             // padding between menu border and items grid

mtDropDown.itemPadding = 5;                             // additional padding around each item

mtDropDown.shadowSize = 0;                              // size of shadow under menu

mtDropDown.shadowOffset = 0;                            // distance shadow should be offset from leading edge

mtDropDown.shadowColor = "#fff";                        // color of shadow (transparency is set in CSS)

mtDropDown.shadowPng = "menu/grey-40.png";               // a PNG graphic to serve as the shadow for mac IE5

mtDropDown.backgroundColor = "#006699";                   // color of the background (transparency set in CSS)

mtDropDown.backgroundPng = "white-90.png";          // a PNG graphic to server as the background for mac IE5

mtDropDown.hideDelay = 1500;                            // number of milliseconds to wait before hiding a menu

mtDropDown.slideTime = 400;                             // number of milliseconds it takes to open and close a menu



//==================================================================================================

// Internal use properties

//==================================================================================================

mtDropDown.reference = {topLeft:1,topRight:2,bottomLeft:3,bottomRight:4};

mtDropDown.direction = {down:1,right:2};

mtDropDown.registry = [];

mtDropDown._maxZ = 100;



//==================================================================================================

// Static methods

//==================================================================================================

// supporting win ie5+, mac ie5.1+ and gecko >= mozilla 1.0

mtDropDown.isSupported = function() {

     var ua = navigator.userAgent.toLowerCase();

     var pf = navigator.platform.toLowerCase();

     var an = navigator.appName;

     var r = false;



     if (ua.indexOf("gecko") > -1) r = true; // gecko >= moz 1.0  && navigator.productSub >= 20020605)

     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

mtDropDown.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

mtDropDown.renderAll = function() {

	var aMenuHtml = [];



	for (var i = 0, menu = null; menu = this.registry[i]; i++) {

		aMenuHtml[i] = menu.toString();

	}

	document.write(aMenuHtml.join(""));

}



//==================================================================================================

// mtDropDown constructor (only called internally)

//==================================================================================================

// oActuator            : The thing that causes the menu to be shown when it is mousedover. Either a

//                        reference to an HTML element, or a mtDropDownItem from an existing menu.

// iDirection           : The direction to slide out. One of mtDropDown.direction.

// iLeft                : Left pixel offset of menu from actuator

// iTop                 : Top pixel offset of menu from actuator

// iReferencePoint      : Corner of actuator to measure from. One of mtDropDown.referencePoint.

// parentMenuSet        : Menuset this menu will be added to.

//==================================================================================================

function mtDropDown(oActuator, iDirection, iLeft, iTop, iReferencePoint, parentMenuSet) {

	// public methods

	this.addItem = addItem;

	this.addMenu = addMenu;

	this.toString = toString;

	this.initialize = initialize;

	this.isOpen = false;

	this.show = show;

	this.hide = hide;

	this.items = [];



	// events

	this.onactivate = new Function();       // when the menu starts to slide open

	this.ondeactivate = new Function();     // when the menu finishes sliding closed

	this.onmouseover = new Function();      // when the menu has been moused over

	this.onqueue = new Function();          // hack .. when the menu sets a timer to be closed a little while in the future

        

	// initialization

	this.index = mtDropDown.registry.length;

	mtDropDown.registry[this.index] = this;



	var id = "mtDropDown" + this.index;

	var contentHeight = null;

	var contentWidth = null;

	var childMenuSet = null;

	var animating = false;

	var childMenus = [];

	var slideAccel = -1;

	var elmCache = null;

	var ready = false;

	var _this = this;

	var a = null;



	var pos = iDirection == mtDropDown.direction.down ? "top" : "left";

	var dim = null;



	// private and public method implimentations

	function addItem(sText, sUrl) {

		var item = new mtDropDownItem(sText, sUrl, this);

		item._index = this.items.length;

		this.items[item._index] = item;

	}



	function addMenu(oMenuItem) {

		if (!oMenuItem.parentMenu == this) throw new Error("Cannot add a menu here");

		if (childMenuSet == null) childMenuSet = new mtDropDownSet(mtDropDown.direction.right, -1, -9, mtDropDown.reference.topRight);

		var m = childMenuSet.addMenu(oMenuItem);



		childMenus[oMenuItem._index] = m;

		m.onmouseover = child_mouseover;

		m.ondeactivate = child_deactivate;

		m.onqueue = child_queue;



		return m;

	}



	function initialize() {

		initCache();

		initEvents();

		initSize();

		ready = true;

	}



	function show() {

		//dbg_dump("show");

		if (ready) {

			_this.isOpen = true;

			animating = true;

			setContainerPos();

			elmCache["clip"].style.visibility = "visible";

			elmCache["clip"].style.zIndex = mtDropDown._maxZ++;

			//dbg_dump("maxZ: " + mtDropDown._maxZ);

			slideStart();

			_this.onactivate();

		}

	}



	function hide() {

		if (ready) {

			_this.isOpen = false;

			animating = true;

			for (var i = 0, item = null; item = elmCache.item[i]; i++) dehighlight(item);

			if (childMenuSet) childMenuSet.hide();

			slideStart();

			_this.ondeactivate();

		}

	}



	function setContainerPos() {

		var sub = oActuator.constructor == mtDropDownItem; 

		var act = sub ? oActuator.parentMenu.elmCache["item"][oActuator._index] : oActuator; 

		var el = act;

                

		var x = 0;

		var y = 0;



		var minX = 0;

		var maxX = (window.innerWidth ? window.innerWidth : document.body.clientWidth) - parseInt(elmCache["clip"].style.width);

		var minY = 0;

		var maxY = (window.innerHeight ? window.innerHeight : document.body.clientHeight) - parseInt(elmCache["clip"].style.height);



		// add up all offsets... subtract any scroll offset

		while (sub ? el.parentNode.className.indexOf("mtDropdownMenu") == -1 : el.offsetParent) {

			x += el.offsetLeft;

			y += el.offsetTop;



			if (el.scrollLeft) x -= el.scrollLeft;

			if (el.scrollTop) y -= el.scrollTop;

				el = el.offsetParent;

		}



		if (oActuator.constructor == mtDropDownItem) {

			x += parseInt(el.parentNode.style.left);

			y += parseInt(el.parentNode.style.top);

		}



		switch (iReferencePoint) {

			case mtDropDown.reference.topLeft:

			break;

			case mtDropDown.reference.topRight:

				x += act.offsetWidth;

			break;

			case mtDropDown.reference.bottomLeft:

				y += act.offsetHeight;

			break;

			case mtDropDown.reference.bottomRight:

				x += act.offsetWidth;

				y += act.offsetHeight;

			break;

		}



		x += iLeft;

		y += iTop;



		x = Math.max(Math.min(x, maxX), minX);

		y = Math.max(Math.min(y, maxY), minY);



		elmCache["clip"].style.left = x + "px";

		elmCache["clip"].style.top = y + "px";

	}



	function slideStart() {

		var x0 = parseInt(elmCache["content"].style[pos]);

		var x1 = _this.isOpen ? 0 : -dim;



		if (a != null) a.stop();

			a = new Accelimation(x0, x1, mtDropDown.slideTime, slideAccel);



		a.onframe = slideFrame;

		a.onend = slideEnd;



		a.start();

	}



	function slideFrame(x) {

		elmCache["content"].style[pos] = x + "px";

	}



	function slideEnd() {

		if (!_this.isOpen) elmCache["clip"].style.visibility = "hidden";

		animating = false;

	}



	function initSize() {

		// everything is based off the size of the items table...

		var ow = elmCache["items"].offsetWidth;

		var oh = elmCache["items"].offsetHeight;

		var ua = navigator.userAgent.toLowerCase();



		// clipping container should be ow/oh + the size of the shadow

		elmCache["clip"].style.width = ow + mtDropDown.shadowSize +  2 + "px";

		elmCache["clip"].style.height = oh + mtDropDown.shadowSize + 2 + "px";



		// same with content...

		elmCache["content"].style.width = ow + mtDropDown.shadowSize + "px";

		elmCache["content"].style.height = oh + mtDropDown.shadowSize + "px";



		contentHeight = oh + mtDropDown.shadowSize;

		contentWidth = ow + mtDropDown.shadowSize;

                

		dim = iDirection == mtDropDown.direction.down ? contentHeight : contentWidth;



		// set initially closed

		elmCache["content"].style[pos] = -dim - mtDropDown.shadowSize + "px";

		elmCache["clip"].style.visibility = "hidden";



		// if *not* mac/ie 5

		if (ua.indexOf("mac") == -1 || ua.indexOf("gecko") > -1) {

			// set background div to offset size

			elmCache["background"].style.width = ow + "px";

			elmCache["background"].style.height = oh + "px";

			elmCache["background"].style.backgroundColor = mtDropDown.backgroundColor;



			// shadow left starts at offset left and is offsetHeight pixels high

			elmCache["shadowRight"].style.left = ow + "px";

			elmCache["shadowRight"].style.height = oh - (mtDropDown.shadowOffset - mtDropDown.shadowSize) + "px";

			elmCache["shadowRight"].style.backgroundColor = mtDropDown.shadowColor;



			// shadow bottom starts at offset height and is offsetWidth - shadowOffset 

			// pixels wide (we don't want the bottom and right shadows to overlap or we 

			// get an extra bright bottom-right corner)

			elmCache["shadowBottom"].style.top = oh + "px";

			elmCache["shadowBottom"].style.width = ow - mtDropDown.shadowOffset + "px";

			elmCache["shadowBottom"].style.backgroundColor = mtDropDown.shadowColor;

		}

		// mac ie is a little different because we use a PNG for the transparency

		else {

			// set background div to offset size

			elmCache["background"].firstChild.src = mtDropDown.backgroundPng;

			elmCache["background"].firstChild.width = ow;

			elmCache["background"].firstChild.height = oh;



			// shadow left starts at offset left and is offsetHeight pixels high

			elmCache["shadowRight"].firstChild.src = mtDropDown.shadowPng;

			elmCache["shadowRight"].style.left = ow + "px";

			elmCache["shadowRight"].firstChild.width = mtDropDown.shadowSize;

			elmCache["shadowRight"].firstChild.height = oh - (mtDropDown.shadowOffset - mtDropDown.shadowSize);



			// shadow bottom starts at offset height and is offsetWidth - shadowOffset 

			// pixels wide (we don't want the bottom and right shadows to overlap or we 

			// get an extra bright bottom-right corner)

			elmCache["shadowBottom"].firstChild.src = mtDropDown.shadowPng;

			elmCache["shadowBottom"].style.top = oh + "px";

			elmCache["shadowBottom"].firstChild.height = mtDropDown.shadowSize;

			elmCache["shadowBottom"].firstChild.width = ow - mtDropDown.shadowOffset;

		}

	}

        

	function initCache() {

		var menu = document.getElementById(id);

		var all = menu.all ? menu.all : menu.getElementsByTagName("*"); // IE/win doesn't support * syntax, but does have the document.all thing



		elmCache = {};

		elmCache["clip"] = menu;

		elmCache["item"] = [];

                

		for (var i = 0, elm = null; elm = all[i]; i++) {

			switch (elm.className) {

				case "items":

				case "content":

				case "background":

				case "shadowRight":

				case "shadowBottom":

					elmCache[elm.className] = elm;

					break;

				case "item":

					elm._index = elmCache["item"].length;

					elmCache["item"][elm._index] = elm;

					break;

			}

		}

		// hack!

		_this.elmCache = elmCache;

	}



	function initEvents() {

		// hook item mouseover

		for (var i = 0, item = null; item = elmCache.item[i]; i++) {

			item.onmouseover = item_mouseover;

			item.onmouseout = item_mouseout;

			item.onclick = item_click;

		}

		// hook actuation

		if (typeof oActuator.tagName != "undefined") {

			oActuator.onmouseover = actuator_mouseover;

			oActuator.onmouseout = actuator_mouseout;

		}

		// hook menu mouseover

		elmCache["content"].onmouseover = content_mouseover;

		elmCache["content"].onmouseout = content_mouseout;

	}



	function highlight(oRow) {

		oRow.className = "item hover";

		if (childMenus[oRow._index]) 

			oRow.lastChild.firstChild.src = mtDropDown.dingbatOn;

	}



	function dehighlight(oRow) {

		oRow.className = "item";

		if (childMenus[oRow._index]) 

			oRow.lastChild.firstChild.src = mtDropDown.dingbatOff;

	}



	function item_mouseover() { //Evento della tendina

		var cycle = false;



		while (cycle == false) {

			if (this != null) {

				cycle = true;

				animating = false;

			}

		}



		if (!animating) {

			highlight(this);

			if (childMenus[this._index]) 

				childMenuSet.showMenu(childMenus[this._index]);

			else if (childMenuSet)

				childMenuSet.hide();

		}

	}



	function item_mouseout() { //Evento della tendina

		if (!animating) {

			if (childMenus[this._index])

				childMenuSet.hideMenu(childMenus[this._index]);

			else // otherwise child_deactivate will do this

				dehighlight(this);

		}

	}



	function item_click() {

		if (!animating) {

			if (_this.items[this._index].url) 

				location.href = _this.items[this._index].url;

		}

	}



	function actuator_mouseover() {

		parentMenuSet.showMenu(_this);

	}



	function actuator_mouseout() {

		parentMenuSet.hideMenu(_this);

	}



	function content_mouseover() {

		if (!animating) {

			parentMenuSet.showMenu(_this);

			_this.onmouseover();

		}

	}



	function content_mouseout() {

		if (!animating) {

			parentMenuSet.hideMenu(_this);

		}

	}



	function child_mouseover() {

		if (!animating) {

			parentMenuSet.showMenu(_this);

		}

	}



	function child_deactivate() {

		for (var i = 0; i < childMenus.length; i++) {

			if (childMenus[i] == this) {

				dehighlight(elmCache["item"][i]);

				break;

			}

		}

	}



	function child_queue() {

		parentMenuSet.hideMenu(_this);

	}



	function toString() {

		var aHtml = [];

		var sClassName = "mtDropdownMenu" + (oActuator.constructor != mtDropDownItem ? " top" : "");



		for (var i = 0, item = null; item = this.items[i]; i++) {

			aHtml[i] = item.toString(childMenus[i]);

		}

		return '<div id="' + id + '" class="' + sClassName + '">' + 

				'<div class="content"><table class="items" cellpadding="0" cellspacing="0" border="0">' + 

				'<tr><td colspan="2"><img src="' + mtDropDown.spacerGif + '" width="1" height="' + mtDropDown.menuPadding + '"></td></tr>' + 

				aHtml.join('') + 

				'<tr><td colspan="2"><img src="' + mtDropDown.spacerGif + '" width="1" height="' + mtDropDown.menuPadding + '"></td></tr></table>' + 

				'<div class="shadowBottom"><img src="' + mtDropDown.spacerGif + '" width="1" height="1"></div>' + 

				'<div class="shadowRight"><img src="' + mtDropDown.spacerGif + '" width="1" height="1"></div>' + 

				'<div class="background"><img src="' + mtDropDown.spacerGif + '" width="1" height="1"></div>' + 

				'</div></div>';

	}

}





//==================================================================================================

// mtDropDownSet

//==================================================================================================

// iDirection           : The direction to slide out. One of mtDropDown.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 mtDropDown.referencePoint.

//==================================================================================================

mtDropDownSet.registry = [];



function mtDropDownSet(iDirection, iLeft, iTop, iReferencePoint) {

	// public methods

	this.addMenu = addMenu;

	this.showMenu = showMenu;

	this.hideMenu = hideMenu;

	this.hide = hide;



	// initialization

	var menus = [];

	var _this = this;

	var current = null;



	this.index = mtDropDownSet.registry.length;

	mtDropDownSet.registry[this.index] = this;



	// method implimentations...

	function addMenu(oActuator) {

		var m = new mtDropDown(oActuator, iDirection, iLeft, 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("mtDropDownSet.registry[" + _this.index + "].hide(mtDropDown.registry[" + oMenu.index + "])", mtDropDown.hideDelay);

	}



	function cancelHide(oMenu) {

		//dbg_dump("cancelHide " + oMenu.index);

		if (oMenu.hideTimer) {

			window.clearTimeout(oMenu.hideTimer);

			oMenu.hideTimer = null;

		}

	}



	function hide(oMenu) {   

		if (!oMenu && current) oMenu = current;

		if (oMenu && current == oMenu && oMenu.isOpen) {

			//dbg_dump("hideA " + oMenu.index);

			cancelHide(oMenu);

			current = null;

			oMenu.hideTimer = null;

			oMenu.hide();

		}

	}

}



//==================================================================================================

// mtDropDownItem (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 mtDropDownItem(sText, sUrl, oParent) {

	this.toString = toString;

	this.text = sText;

	this.url = sUrl;

	this.parentMenu = oParent;



	function toString(bDingbat) {

		var sDingbat = bDingbat ? mtDropDown.dingbatOff : mtDropDown.spacerGif;

		var iEdgePadding = mtDropDown.itemPadding + mtDropDown.menuPadding;

		var sPaddingLeft = "padding:" + mtDropDown.itemPadding + "px; padding-left:" + iEdgePadding + "px;"

		var sPaddingRight = "padding:" + mtDropDown.itemPadding + "px; padding-right:" + iEdgePadding + "px;"

		var dingbatSize = mtDropDown.dingbatSize;



		return '<tr class="item"><td nowrap style="' + sPaddingLeft + '">' + 

				sText + '</td><td width="' + dingbatSize + '" style="' + sPaddingRight + '">' + 

				'<img src="' + sDingbat + '" width="' + dingbatSize + '" height="' + dingbatSize + '"></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;