function DOMUtils(doc, settings) {
		var self = this, blockElementsMap;

		self.doc = doc;
		self.win = window;
		self.files = {};
		self.counter = 0;
		self.stdMode = !isIE || doc.documentMode >= 8;
		self.boxModel = !isIE || doc.compatMode == "CSS1Compat" || self.stdMode;
		self.styleSheetLoader = new StyleSheetLoader(doc);
		self.boundEvents = [];
		self.settings = settings = settings || {};
		self.schema = settings.schema;
		self.styles = new Styles({
			url_converter: settings.url_converter,
			url_converter_scope: settings.url_converter_scope
		}, settings.schema);

		self.fixDoc(doc);
		self.events = settings.ownEvents ? new EventUtils(settings.proxy) : EventUtils.Event;
		self.attrHooks = setupAttrHooks(self, settings);
		blockElementsMap = settings.schema ? settings.schema.getBlockElements() : {};
		self.$ = $.overrideDefaults(function() {
			return {
				context: doc,
				element: self.getRoot()
			};
		});

		/**
		 * Returns true/false if the specified element is a block element or not.
		 *
		 * @method isBlock
		 * @param {Node/String} node Element/Node to check.
		 * @return {Boolean} True/False state if the node is a block element or not.
		 */
		self.isBlock = function(node) {
			// Fix for #5446
			if (!node) {
				return false;
			}

			// This function is called in module pattern style since it might be executed with the wrong this scope
			var type = node.nodeType;

			// If it's a node then check the type and use the nodeName
			if (type) {
				return !!(type === 1 && blockElementsMap[node.nodeName]);
			}

			return !!blockElementsMap[node];
		};
	}
Constructs a new DOMUtils instance. Consult the Wiki for more details on settings etc for this class.

@constructor
@method DOMUtils
@param {Document} doc Document reference to bind the utility class to.
@param {settings} settings Optional settings collection.