Declare all classes as local variables, so they can be scoped.

src/Paper.js

@@ -1,4 +1,4 @@
-Paper = Base.extend({
+var Paper = Base.extend({
 	statics: {
 		documents: [],
 		activateDocument: function(doc) {

src/basic/Rectangle.js

@@ -1,4 +1,4 @@
-Rectangle = Base.extend({
+var Rectangle = Base.extend({
 	beans: true,
 
 	initialize: function() {

src/color/Color.js

@@ -1,4 +1,4 @@
-Color = Base.extend({
+var Color = Base.extend({
 	beans: true,
 
 	/**

src/color/Gradient.js

@@ -1,4 +1,4 @@
-Gradient = Base.extend({
+var Gradient = Base.extend({
 	initialize: function() {
 		this.stops = [new GradientStop('white', 0), new GradientStop('black', 1)];
 		this.type = 'linear';

src/color/GradientColor.js

@@ -1,4 +1,4 @@
-GradientColor = Color.extend({
+var GradientColor = Color.extend({
 	beans: true,
 
 	initialize: function(gradient, origin, destination, hilite) {

src/color/GradientStop.js

@@ -1,4 +1,4 @@
-GradientStop = Base.extend({
+var GradientStop = Base.extend({
 	beans: true,
 
 	// TODO: support midPoint? (initial tests didn't look nice)

src/color/GrayColor.js

@@ -1,4 +1,4 @@
-GrayColor = Color.extend({
+var GrayColor = Color.extend({
 	beans: true,
 
 	initialize: function() {

src/color/RGBColor.js

@@ -1,4 +1,4 @@
-RGBColor = Color.extend(new function() {
+var RGBColor = Color.extend(new function() {
 	// TODO: convert hex codes to [r,g,b]?
 	var namedColors = {
 		lightpink: 'FFB6C1', pink: 'FFC0CB', crimson: 'DC143C',

src/document/Doc.js

@@ -1,4 +1,4 @@
-Doc = Base.extend({
+var Doc = Base.extend({
 	beans: true,
 
 	initialize: function(canvas) {

src/document/DocumentView.js

@@ -1,4 +1,4 @@
-DocumentView = Base.extend({
+var DocumentView = Base.extend({
 	beans: true,
 
 	initialize: function(document) {

src/document/Symbol.js

@@ -1,4 +1,4 @@
-Symbol = Base.extend({
+var Symbol = Base.extend({
 	beans: true,
 
 	initialize: function(item) {

src/item/Group.js

@@ -1,4 +1,4 @@
-Group = Item.extend({
+var Group = Item.extend({
 	beans: true,
 	initialize: function(items) {
 		this.base();

src/item/Item.js

@@ -1,4 +1,4 @@
-Item = Base.extend({
+var Item = Base.extend({
 	beans: true,
 
 	initialize: function() {

src/item/Layer.js

@@ -1,4 +1,4 @@
-Layer = Group.extend({
+var Layer = Group.extend({
 	beans: true,
 
 	initialize: function() {

src/item/PathStyle.js

@@ -1,4 +1,4 @@
-PathStyle = Base.extend(new function() {
+var PathStyle = Base.extend(new function() {
 	var keys = ['windingRule', 'resolution', 'strokeColor', 'strokeWidth',
 			'strokeCap', 'strokeJoin', 'dashOffset','dashArray', 'miterLimit',
 			'strokeOverprint', 'fillColor', 'fillOverprint'];

src/item/PlacedSymbol.js

@@ -1,4 +1,4 @@
-PlacedSymbol = Item.extend({
+var PlacedSymbol = Item.extend({
 	beans: true,
 	
 	initialize: function() {

src/item/Raster.js

@@ -1,4 +1,4 @@
-Raster = Item.extend({
+var Raster = Item.extend({
 	beans: true,
 
 	// TODO: implement url / type, width, height

src/path/CompoundPath.js

@@ -1,4 +1,4 @@
-CompoundPath = PathItem.extend({
+var CompoundPath = PathItem.extend({
 	initialize: function(items) {
 		this.base();
 		this.children = [];

src/path/Curve.js

@@ -1,8 +1,7 @@
-Curve = Base.extend({
+var Curve = Base.extend({
 	initialize: function() {
 	},
-	
-	
+
 	statics: {
 		read: function(args, index, length) {
 			var index = index || 0, length = length || args.length - index;

src/path/Path.js

@@ -1,4 +1,4 @@
-Path = PathItem.extend({
+var Path = PathItem.extend({
 	beans: true,
 
 	initialize: function(/* segments */) {

src/path/PathItem.js

@@ -1,4 +1,4 @@
-PathItem = Item.extend({
+var PathItem = Item.extend({
 	beans: true,
 
 	initialize: function() {

src/path/Segment.js

@@ -1,4 +1,4 @@
-Segment = Base.extend({
+var Segment = Base.extend({
 	initialize: function() {
 		if (arguments.length == 0) {
 			this.point = new Point();

src/tool/Tool.js

@@ -1,4 +1,4 @@
-Tool = ToolHandler.extend(new function() {
+var Tool = ToolHandler.extend(new function() {
 	function viewToArtwork(event, document) {
 		var point = Point.create(event.offset.x, event.offset.y);
 		// TODO: always the active view?

src/tool/ToolHandler.js

@@ -1,4 +1,4 @@
-ToolHandler = Base.extend({
+var ToolHandler = Base.extend({
 	beans: true,
 
 	/**