Add stack traces (at least in V8) and messages to DOMExceptions

Conflicts:

	lib/jsdom/level1/core.js

lib/jsdom/level1/core.js

@@ -48,14 +48,15 @@ var core = {
 };
 var sys = require("sys");
 
-core.DOMException = function(code, msg) {
+core.DOMException = function(code) {
   this._code = code;
-  this._msg  = msg || ""
+  Error.call(this, messages[code]);
+  this.message = messages[code];
+  if(Error.captureStackTrace) Error.captureStackTrace(this, core.DOMException);
 };
 
 core.DOMException.prototype = {
   get code() { return this._code;},
-  get msg() { return thise._msg; }
 };
 
 core.DOMException.prototype.__proto__ = Error.prototype;
@@ -72,6 +73,18 @@ var NOT_FOUND_ERR               = core.NOT_FOUND_ERR               = 8;
 var NOT_SUPPORTED_ERR           = core.NOT_SUPPORTED_ERR           = 9;
 var INUSE_ATTRIBUTE_ERR         = core.INUSE_ATTRIBUTE_ERR         = 10;
 
+var messages = {}
+messages[INDEX_SIZE_ERR] = "Index size error";
+messages[DOMSTRING_SIZE_ERR] = "DOMString size error";
+messages[HIERARCHY_REQUEST_ERR] = "Heirarchy request error";
+messages[WRONG_DOCUMENT_ERR] = "Wrong document";
+messages[INVALID_CHARACTER_ERR] = "Invalid character";
+messages[NO_DATA_ALLOWED_ERR] = "No data allowed";
+messages[NO_MODIFICATION_ALLOWED_ERR] = "No modification allowed";
+messages[NOT_FOUND_ERR] = "Not found";
+messages[NOT_SUPPORTED_ERR] = "Not supported";
+messages[INUSE_ATTRIBUTE_ERR] = "Attribute in use";
+
 core.NodeList = function(document, element, tagName) {
   this._document = document;
   this._element  = element;