PopMenuSet.registry = [];
function PopMenuSet(iDirection, iLeft, iTop, iReferencePoint) {
	this.addMenu = addMenu;
	this.showMenu = showMenu;
	this.hideMenu = hideMenu;
	this.hide = hide;
	var menus = [];
	var _this = this;
	var current = null;
	this.index = PopMenuSet.registry.length;
	PopMenuSet.registry[this.index] = this;
	function addMenu(MenuItem) {
		var m = new PopMenu(MenuItem, iDirection, iLeft, iTop, iReferencePoint, this);
		menus[menus.length] = m;
		return m;
	}
	function showMenu(oMenu) {
		if (oMenu != current) {
			if (current != null) hide(current);
			current = oMenu;
			oMenu.show();
		}
		else {
			cancelHide(oMenu);
		}
	}
	function hideMenu(oMenu) {
		if (current == oMenu && oMenu.isOpen) {
			if (!oMenu.hideTimer) scheduleHide(oMenu);
		}
	}
	function scheduleHide(oMenu) {
		oMenu.onqueue();
		oMenu.hideTimer = window.setTimeout("PopMenuSet.registry[" + _this.index + "].hide(PopMenu.registry[" + oMenu.index + "])", PopMenu.hideDelay);
	}
	function cancelHide(oMenu) {
		if (oMenu.hideTimer) {
			window.clearTimeout(oMenu.hideTimer);
			oMenu.hideTimer = null;
		}
	}
	function hide(oMenu) {
		if (!oMenu && current) oMenu = current;
		if (oMenu && current == oMenu && oMenu.isOpen) {
			cancelHide(oMenu);
			current = null;
			oMenu.hideTimer = null;
			oMenu.hide();
		}
	}
}

PopMenu.menuPadding = 1;
PopMenu.itemPadding = 4;
PopMenu.shadowSize = 2;
PopMenu.shadowOffset = 3;
PopMenu.shadowColor = "#16347A";
PopMenu.backgroundColor = "#1775B3";
PopMenu.shadowPng = "";      //Compatible for Mac
PopMenu.backgroundPng = "";  //Compatible for Mac
PopMenu.hideDelay = 500;
PopMenu.slideTime = 300;
PopMenu.reference = {topLeft:1,topRight:2,bottomLeft:3,bottomRight:4};
PopMenu.direction = {down:1,right:2};
PopMenu._maxZ = 100;
PopMenu.isSupported = function() {
	if (typeof PopMenu.isSupported.r == "boolean")
		return PopMenu.isSupported.r;
	var ua = navigator.userAgent.toLowerCase();
	var an = navigator.appName;
	var r = false;
	if (ua.indexOf("gecko") > -1) r = true;
	if (ua.indexOf("opera") > -1) r = true;
	else if (an == "Microsoft Internet Explorer") {
		if (document.getElementById) r = true;
	}
	PopMenu.isSupported.r = r;
	return r;
}
PopMenu.initialize = function() {
	for (var i = 0, menu = null; menu = this.registry[i]; i++) {
		menu.initialize();
	}
}
PopMenu.renderAll = function() {
	var aMenuHtml = [];
	for (var i = 0, menu = null; menu = this.registry[i]; i++) {
		aMenuHtml[i] = menu.toString();
	}
	document.write(aMenuHtml.join(""));
}
PopMenu.registry = [];
function PopMenu(MenuItem, iDirection, iLeft, iTop, iReferencePoint, parentMenuSet) {
	this.create = create;
	this.addItem = addItem;
	this.addMenu = addMenu;
	this.toString = toString;
	this.initialize = initialize;
	this.isOpen = false;
	this.show = show;
	this.hide = hide;
	this.items = [];
	this.onactivate = new Function();
	this.ondeactivate = new Function();
	this.onmouseover = new Function();
	this.onqueue = new Function();
	this.index = PopMenu.registry.length;
	PopMenu.registry[this.index] = this;
	this.id = "PopMenu" + this.index;
	var id = this.id;
	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 == PopMenu.direction.down ? "top" : "left";
	var dim = null;
	create();

	function addItem(sText, sUrl) {
		var item = new PopMenuItem(sText, sUrl, this);
		item._index = this.items.length;
		this.items[item._index] = item;
		return item;
	}
	function addMenu(oMenuItem) {
		if (!oMenuItem.parentMenu == this) throw new Error("Cannot add a menu here");
		if (childMenuSet == null) childMenuSet = new PopMenuSet(PopMenu.direction.right, -5, 2, PopMenu.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() {
		if (ready) {
			_this.isOpen = true;
			animating = true;
			initSize();
			setContainerPos();
			elmCache["clip"].style.visibility = "visible";
			elmCache["clip"].style.zIndex = PopMenu._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 = MenuItem.constructor == PopMenuItem;
		var act = sub ? MenuItem.parentMenu.elmCache["item"][MenuItem._index] : MenuItem;
		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);
		while (sub ? el.parentNode.className.indexOf("PopMenu") == -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 (MenuItem.constructor == PopMenuItem) {
			x += parseInt(el.parentNode.style.left);
			y += parseInt(el.parentNode.style.top);
		}
		switch (iReferencePoint) {
		case PopMenu.reference.topLeft:
			break;
		case PopMenu.reference.topRight:
			x += act.offsetWidth;
			break;
		case PopMenu.reference.bottomLeft:
			y += act.offsetHeight;
			break;
		case PopMenu.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 PopUp(x0, x1, PopMenu.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() {
		var sub = MenuItem.constructor == PopMenuItem;
		var act = sub ? MenuItem.parentMenu.elmCache["item"][MenuItem._index] : MenuItem;
		elmCache["clip"].firstChild.firstChild.style.width = act.clientWidth - PopMenu.shadowSize;
		var ow = elmCache["items"].offsetWidth;
		var oh = elmCache["items"].offsetHeight;
		var ua = navigator.userAgent.toLowerCase();
		elmCache["clip"].style.width = ow + PopMenu.shadowSize + 2 + "px";
		elmCache["clip"].style.height = oh + PopMenu.shadowSize + 2 + "px";
		elmCache["content"].style.width = ow + PopMenu.shadowSize + "px";
		elmCache["content"].style.height = oh + PopMenu.shadowSize + "px";
		contentHeight = oh + PopMenu.shadowSize;
		contentWidth = ow + PopMenu.shadowSize;
		dim = iDirection == PopMenu.direction.down ? contentHeight : contentWidth;
		elmCache["content"].style[pos] = -dim - PopMenu.shadowSize + "px";
		elmCache["clip"].style.visibility = "hidden";
		if (ua.indexOf("mac") == -1 || ua.indexOf("gecko") > -1) {
			elmCache["background"].style.width = ow + "px";
			elmCache["background"].style.height = oh + "px";
			elmCache["background"].style.backgroundColor = PopMenu.backgroundColor;
			elmCache["shadowRight"].style.left = ow + "px";
			if ((sh = oh - (PopMenu.shadowOffset - PopMenu.shadowSize))>=0)	{
				elmCache["shadowRight"].style.height = sh + "px";
			} else {
				elmCache["shadowRight"].style.height = "0px";
			}
			elmCache["shadowRight"].style.backgroundColor = PopMenu.shadowColor;
			elmCache["shadowBottom"].style.top = oh + "px";
			if ((sw = ow - PopMenu.shadowOffset)>=0)	{
				elmCache["shadowBottom"].style.width = sw + "px";
			} else {
				elmCache["shadowBottom"].style.width = "0px";
			}
			elmCache["shadowBottom"].style.backgroundColor = PopMenu.shadowColor;
		}
		else {
			elmCache["background"].firstChild.src = PopMenu.backgroundPng;
			elmCache["background"].firstChild.width = ow;
			elmCache["background"].firstChild.height = oh;
			elmCache["shadowRight"].firstChild.src = PopMenu.shadowPng;
			elmCache["shadowRight"].style.left = ow + "px";
			elmCache["shadowRight"].firstChild.width = PopMenu.shadowSize;
			if ((sh = oh - (PopMenu.shadowOffset - PopMenu.shadowSize))>=0)	{
				elmCache["shadowRight"].firstChild.height = sh + "px";
			} else {
				elmCache["shadowRight"].firstChild.height = "0px";
			}
			elmCache["shadowBottom"].firstChild.src = PopMenu.shadowPng;
			elmCache["shadowBottom"].style.top = oh + "px";
			elmCache["shadowBottom"].firstChild.height = PopMenu.shadowSize;
			if ((sw = ow - PopMenu.shadowOffset)>=0)	{
				elmCache["shadowBottom"].firstChild.width = sw + "px";
			} else {
				elmCache["shadowBottom"].firstChild.width = "0px";
			}
		}
	}
	function initCache() {
		var menu = document.getElementById(id);
		var all = menu.all ? menu.all : menu.getElementsByTagName("*");
		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;
			}
		}
		_this.elmCache = elmCache;
	}
	function initEvents() {
		for (var i = 0, item = null; item = elmCache.item[i]; i++) {
			item.onmouseover = item_mouseover;
			item.onmouseout = item_mouseout;
			item.onclick = item_click;
		}
		if (typeof MenuItem.tagName != "undefined") {
			MenuItem.onmouseover = actuator_mouseover;
			MenuItem.onmouseout = actuator_mouseout;
		}
		elmCache["content"].onmouseover = content_mouseover;
		elmCache["content"].onmouseout = content_mouseout;
	}
	function highlight(oRow) {
		oRow.className = "item hover";
	}
	function dehighlight(oRow) {
		oRow.className = "item";
	}
	function item_mouseover() {
		if (!animating) {
			highlight(this);
			if (childMenus[this._index]) {
				childMenuSet.showMenu(childMenus[this._index]);
			}
			else
				if (childMenuSet) childMenuSet.hide();
		}
	}
	function item_mouseout() {
		if (!animating) {
			if (childMenus[this._index])
				childMenuSet.hideMenu(childMenus[this._index]);
			else
				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 = "PopMenu" + (MenuItem.constructor != PopMenuItem ? " 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="Spacer.gif" width="1" height="' + PopMenu.menuPadding + '"></td></tr>' +
			aHtml.join('') +
		'<tr><td colspan="2"><img src="Spacer.gif" width="1" height="' + PopMenu.menuPadding + '"></td></tr></table>' +
			'<div class="shadowBottom"><img src="Spacer.gif" width="1" height="1"></div>' +
			'<div class="shadowRight"><img src="Spacer.gif" width="1" height="1"></div>' +
			'<div class="background"><img src="Spacer.gif" width="1" height="1"></div>' +
			'</div></div>';
	}
	function create() {
		var div = document.createElement("DIV");
		div.id = id;
		div.className="PopMenu" + (MenuItem.constructor != PopMenuItem ? " top" : "");
		div.appendChild(getPAD());

		document.body.appendChild(div);

		function getPAD() {
			var div = document.createElement("DIV");
			div.className = "content";
			div.appendChild(getTABLE());
			div.appendChild(getDIV("shadowBottom"));
			div.appendChild(getDIV("shadowRight"));
			div.appendChild(getDIV("background"));
			//add an iframe to prevent the menu cover up by <select> element in  IE Browser 
			var an = navigator.appName;
			if (an == "Microsoft Internet Explorer") {
				var ifr = document.createElement("iframe");
				ifr.setAttribute("frameBorder","no");
				ifr.style.filter = "alpha(style=0,opacity=0)";
				ifr.style.zIndex = -1;
				ifr.style.visibility = "inherit";
				ifr.style.position = "absolute";
				ifr.style.left = 0;
				ifr.style.top = 0;
				ifr.style.width = "100%";
				ifr.style.height = "100%";
				div.appendChild(ifr);
			}
			return div;
			function getDIV(className){
				var div = document.createElement("DIV");
				div.className = className;
				div.innerHTML = "<img src='' width=1 height=1>";
				return div;
			}
			function getTABLE(){
				var thead = document.createElement("THEAD");
				thead.appendChild(getTR());
				var tbody = document.createElement("TBODY");
				var tfoot = document.createElement("TFOOT");
				tfoot.appendChild(getTR());
				var tbl = document.createElement("TABLE");
				tbl.className = 'items';
				tbl.setAttribute('cellSpacing',"0");
				tbl.setAttribute('cellPadding',"0");
				tbl.appendChild(thead);
				tbl.appendChild(tbody);
				tbl.appendChild(tfoot);
				return tbl;
				function getTR() {
					var td = document.createElement("TD");
					td.setAttribute('colSpan',"2");
					td.setAttribute('height',PopMenu.menuPadding);

					var tr = document.createElement("TR");
					tr.appendChild(td);
					return tr;
				}
			}
		}
	}

}

function PopMenuItem(sText, sUrl, oParent) {
	this.create = create;
	this.toString = toString;
	this.text = sText;
	this.url = sUrl;
	this.parentMenu = oParent;
	create();
	function toString(childMenuItem) {
		var iEdgePadding = PopMenu.itemPadding + PopMenu.menuPadding;
		var sPaddingLeft = "padding:" + PopMenu.itemPadding + "px; padding-left:" + iEdgePadding + "px;"
		var sPaddingRight = "padding:" + PopMenu.itemPadding + "px; padding-right:" + iEdgePadding + "px;"
		return '<tr class="item"><td nowrap style="' + sPaddingLeft + '">' +
		sText + '</td></tr>';
	}

	function create() {
		var pad = document.getElementById(oParent.id); //PopMenu
		pad = pad.firstChild.firstChild; // PopMenu table
		pad = pad.firstChild.nextSibling; // PopMenu Table TBODY
		pad.appendChild(getTR());
		function getTR() {
			var iEdgePadding = PopMenu.itemPadding + PopMenu.menuPadding;
			var td = document.createElement("TD");
			td.setAttribute("noWrap","true");
			td.setAttribute("align","center");
			td.style.padding = PopMenu.itemPadding;
			td.style.paddingLeft =iEdgePadding;
			td.innerHTML = sText;

			var tr = document.createElement("TR");
			tr.className = "item";
			tr.appendChild(td);
			return tr;
		}
	}
}

function PopUp(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();
}
PopUp.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);
	PopUp._add(this);
}
PopUp.prototype.stop = function() {
	PopUp._remove(this);
}
PopUp.prototype._paint = function(time) {
	if (time < this.t1) {
		var elapsed = time - this.t0;
		this.onframe(PopUp._getBezier(elapsed/this.dt,this.x0,this.x1,this.c1,this.c2));
	}
	else this._end();
}
PopUp.prototype._end = function() {
	PopUp._remove(this);
	this.onframe(this.x1);
	this.onend();
}
PopUp._add = function(o) {
	var index = this.instances.length;
	this.instances[index] = o;
	if (this.instances.length == 1) {
		this.timerID = window.setInterval("PopUp._paintAll()", this.targetRes);
	}
}
PopUp._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 (this.instances.length == 0) {
		window.clearInterval(this.timerID);
		this.timerID = null;
	}
}
PopUp._paintAll = function() {
	var now = new Date().getTime();
	for (var i = 0; i < this.instances.length; i++) {
		this.instances[i]._paint(now);
	}
}
PopUp._B1 = function(t) { return t*t*t }
PopUp._B2 = function(t) { return 3*t*t*(1-t) }
PopUp._B3 = function(t) { return 3*t*(1-t)*(1-t) }
PopUp._B4 = function(t) { return (1-t)*(1-t)*(1-t) }
PopUp._getBezier = function(percent,startPos,endPos,control1,control2) {
	return endPos * this._B1(percent) + control2 * this._B2(percent) + control1 * this._B3(percent) + startPos * this._B4(percent);
}
PopUp.instances = [];
PopUp.targetRes = 10;
PopUp.timerID = null;

/*
 * 二级子菜单可正常显示、使用，三级子菜单可显示但将鼠标指向时菜单全部消失
 */