diff --git a/user_guide/scripts/moo.fx.js b/user_guide/scripts/moo.fx.js
new file mode 100755
index 0000000..953e87c
--- /dev/null
+++ b/user_guide/scripts/moo.fx.js
@@ -0,0 +1,119 @@
+/*
+moo.fx, simple effects library built with prototype.js (http://prototype.conio.net).
+by Valerio Proietti (http://mad4milk.net) MIT-style LICENSE.
+for more info (http://moofx.mad4milk.net).
+10/24/2005
+v(1.0.2)
+*/
+
+//base
+var fx = new Object();
+fx.Base = function(){};
+fx.Base.prototype = {
+	setOptions: function(options) {
+	this.options = {
+		duration: 500,
+		onComplete: ''
+	}
+	Object.extend(this.options, options || {});
+	},
+
+	go: function() {
+		this.duration = this.options.duration;
+		this.startTime = (new Date).getTime();
+		this.timer = setInterval (this.step.bind(this), 13);
+	},
+
+	step: function() {
+		var time  = (new Date).getTime();
+		var Tpos   = (time - this.startTime) / (this.duration);
+		if (time >= this.duration+this.startTime) {
+			this.now = this.to;
+			clearInterval (this.timer);
+			this.timer = null;
+			if (this.options.onComplete) setTimeout(this.options.onComplete.bind(this), 10);
+		}
+		else {
+			this.now = ((-Math.cos(Tpos*Math.PI)/2) + 0.5) * (this.to-this.from) + this.from;
+			//this time-position, sinoidal transition thing is from script.aculo.us
+		}
+		this.increase();
+	},
+
+	custom: function(from, to) {
+		if (this.timer != null) return;
+		this.from = from;
+		this.to = to;
+		this.go();
+	},
+
+	hide: function() {
+		this.now = 0;
+		this.increase();
+	},
+
+	clearTimer: function() {
+		clearInterval(this.timer);
+		this.timer = null;
+	}
+}
+
+//stretchers
+fx.Layout = Class.create();
+fx.Layout.prototype = Object.extend(new fx.Base(), {
+	initialize: function(el, options) {
+		this.el = $(el);
+		this.el.style.overflow = "hidden";
+		this.el.iniWidth = this.el.offsetWidth;
+		this.el.iniHeight = this.el.offsetHeight;
+		this.setOptions(options);
+	}
+});
+
+fx.Height = Class.create();
+Object.extend(Object.extend(fx.Height.prototype, fx.Layout.prototype), {	
+	increase: function() {
+		this.el.style.height = this.now + "px";
+	},
+
+	toggle: function() {
+		if (this.el.offsetHeight > 0) this.custom(this.el.offsetHeight, 0);
+		else this.custom(0, this.el.scrollHeight);
+	}
+});
+
+fx.Width = Class.create();
+Object.extend(Object.extend(fx.Width.prototype, fx.Layout.prototype), {	
+	increase: function() {
+		this.el.style.width = this.now + "px";
+	},
+
+	toggle: function(){
+		if (this.el.offsetWidth > 0) this.custom(this.el.offsetWidth, 0);
+		else this.custom(0, this.el.iniWidth);
+	}
+});
+
+//fader
+fx.Opacity = Class.create();
+fx.Opacity.prototype = Object.extend(new fx.Base(), {
+	initialize: function(el, options) {
+		this.el = $(el);
+		this.now = 1;
+		this.increase();
+		this.setOptions(options);
+	},
+
+	increase: function() {
+		if (this.now == 1) this.now = 0.9999;
+		if (this.now > 0 && this.el.style.visibility == "hidden") this.el.style.visibility = "visible";
+		if (this.now == 0) this.el.style.visibility = "hidden";
+		if (window.ActiveXObject) this.el.style.filter = "alpha(opacity=" + this.now*100 + ")";
+		this.el.style.opacity = this.now;
+	},
+
+	toggle: function() {
+		if (this.now > 0) this.custom(1, 0);
+		else this.custom(0, 1);
+	}
+});
\ No newline at end of file