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diff --git a/assignment1/materials/Environmental Impact Assessment Course Module » 1-4 Principles of EIA administration and practice_files/moo.js b/assignment1/materials/Environmental Impact Assessment Course Module » 1-4 Principles of EIA administration and practice_files/moo.js
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+/*
+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).
+Sunday, March 05, 2006
+v 1.2.3
+*/
+
+var fx = new Object();
+//base
+fx.Base = function(){};
+fx.Base.prototype = {
+	setOptions: function(options) {
+	this.options = {
+		duration: 500,
+		onComplete: '',
+		transition: fx.sinoidal
+	}
+	Object.extend(this.options, options || {});
+	},
+
+	step: function() {
+		var time  = (new Date).getTime();
+		if (time >= this.options.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 {
+			var Tpos = (time - this.startTime) / (this.options.duration);
+			this.now = this.options.transition(Tpos) * (this.to-this.from) + this.from;
+		}
+		this.increase();
+	},
+
+	custom: function(from, to) {
+		if (this.timer != null) return;
+		this.from = from;
+		this.to = to;
+		this.startTime = (new Date).getTime();
+		this.timer = setInterval (this.step.bind(this), 13);
+	},
+
+	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.iniWidth = this.el.offsetWidth;
+		this.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.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 && (/Firefox/.test(navigator.userAgent))) this.now = 0.9999;
+		this.setOpacity(this.now);
+	},
+	
+	setOpacity: function(opacity) {
+		if (opacity == 0 && this.el.style.visibility != "hidden") this.el.style.visibility = "hidden";
+		else if (this.el.style.visibility != "visible") this.el.style.visibility = "visible";
+		if (window.ActiveXObject) this.el.style.filter = "alpha(opacity=" + opacity*100 + ")";
+		this.el.style.opacity = opacity;
+	},
+
+	toggle: function() {
+		if (this.now > 0) this.custom(1, 0);
+		else this.custom(0, 1);
+	}
+});
+
+//transitions
+fx.sinoidal = function(pos){
+	return ((-Math.cos(pos*Math.PI)/2) + 0.5);
+	//this transition is from script.aculo.us
+}
+fx.linear = function(pos){
+	return pos;
+}
+fx.cubic = function(pos){
+	return Math.pow(pos, 3);
+}
+fx.circ = function(pos){
+	return Math.sqrt(pos);
+}
+\ No newline at end of file