    /**
     * @class Ext.dom.Element
     */
    Ext.dom.Element.addMembers({

        /**
         * Appends the passed element(s) to this element
         * @param {HTMLElement/Ext.dom.Element} element a DOM Node or an existing Element.
         * @return {Ext.dom.Element} This element
         */
        appendChild: function(element) {
            this.dom.appendChild(Ext.getDom(element));

            return this;
        },

        append: function() {
            this.appendChild.apply(this, arguments);
        },

        /**
         * Appends this element to the passed element
         * @param {String/HTMLElement/Ext.dom.Element} el The new parent element.
         * The id of the node, a DOM Node or an existing Element.
         * @return {Ext.dom.Element} This element
         */
        appendTo: function(el) {
            Ext.getDom(el).appendChild(this.dom);
            return this;
        },

        /**
         * Inserts this element before the passed element in the DOM
         * @param {String/HTMLElement/Ext.dom.Element} el The element before which this element will be inserted.
         * The id of the node, a DOM Node or an existing Element.
         * @return {Ext.dom.Element} This element
         */
        insertBefore: function(el) {
            el = Ext.getDom(el);
            el.parentNode.insertBefore(this.dom, el);
            return this;
        },

        /**
         * Inserts this element after the passed element in the DOM
         * @param {String/HTMLElement/Ext.dom.Element} el The element to insert after.
         * The id of the node, a DOM Node or an existing Element.
         * @return {Ext.dom.Element} This element
         */
        insertAfter: function(el) {
            el = Ext.getDom(el);
            el.parentNode.insertBefore(this.dom, el.nextSibling);
            return this;
        },

        /**
         * Inserts an element as the first child of this element
         * @param {String/HTMLElement/Ext.dom.Element} element The id or element to insert
         * @return {Ext.dom.Element} this
         */
        insertFirst: function(element) {
            var elementDom = Ext.getDom(element),
                dom = this.dom,
                firstChild = dom.firstChild;

            if (!firstChild) {
                dom.appendChild(elementDom);
            }
            else {
                dom.insertBefore(elementDom, firstChild);
            }

            return this;
        },

        /**
         * Inserts (or creates) the passed element (or DomHelper config) as a sibling of this element
         * @param {String/HTMLElement/Ext.dom.Element/Object/Array} el The id, element to insert or a DomHelper config
         * to create and insert *or* an array of any of those.
         * @param {String} where (optional) 'before' or 'after' defaults to before
         * @param {Boolean} returnDom (optional) True to return the raw DOM element instead of Ext.dom.Element
         * @return {Ext.dom.Element} The inserted Element. If an array is passed, the last inserted element is returned.
         */
        insertSibling: function(el, where, returnDom) {
            var me = this, rt,
                isAfter = (where || 'before').toLowerCase() == 'after',
                insertEl;

            if (Ext.isArray(el)) {
                insertEl = me;
                Ext.each(el, function(e) {
                    rt = Ext.fly(insertEl, '_internal').insertSibling(e, where, returnDom);
                    if (isAfter) {
                        insertEl = rt;
                    }
                });
                return rt;
            }

            el = el || {};

            if (el.nodeType || el.dom) {
                rt = me.dom.parentNode.insertBefore(Ext.getDom(el), isAfter ? me.dom.nextSibling : me.dom);
                if (!returnDom) {
                    rt = Ext.get(rt);
                }
            } else {
                if (isAfter && !me.dom.nextSibling) {
                    rt = Ext.core.DomHelper.append(me.dom.parentNode, el, !returnDom);
                } else {
                    rt = Ext.core.DomHelper[isAfter ? 'insertAfter' : 'insertBefore'](me.dom, el, !returnDom);
                }
            }
            return rt;
        },

        /**
         * Replaces the passed element with this element
         * @param {String/HTMLElement/Ext.dom.Element} el The element to replace.
         * The id of the node, a DOM Node or an existing Element.
         * @return {Ext.dom.Element} This element
         */
        replace: function(el) {
            el = Ext.get(el);
            this.insertBefore(el);
            el.remove();
            return this;
        },

        /**
         * Replaces this element with the passed element
         * @param {String/HTMLElement/Ext.dom.Element/Object} el The new element (id of the node, a DOM Node
         * or an existing Element) or a DomHelper config of an element to create
         * @return {Ext.dom.Element} This element
         */
        replaceWith: function(el) {
            var me = this;

            if (el.nodeType || el.dom || typeof el == 'string') {
                el = Ext.get(el);
                me.dom.parentNode.insertBefore(el, me.dom);
            } else {
                el = Ext.core.DomHelper.insertBefore(me.dom, el);
            }

            delete Ext.cache[me.id];
            Ext.removeNode(me.dom);
            me.id = Ext.id(me.dom = el);
            Ext.dom.Element.addToCache(me.isFlyweight ? new Ext.dom.Element(me.dom) : me);
            return me;
        },

        /**
         * Creates the passed DomHelper config and appends it to this element or optionally inserts it before the passed child element.
         * @param {Object} config DomHelper element config object.  If no tag is specified (e.g., {tag:'input'}) then a div will be
         * automatically generated with the specified attributes.
         * @param {HTMLElement} insertBefore (optional) a child element of this element
         * @param {Boolean} returnDom (optional) true to return the dom node instead of creating an Element
         * @return {Ext.dom.Element} The new child element
         */
        createChild: function(config, insertBefore, returnDom) {
            config = config || {tag: 'div'};
            if (insertBefore) {
                return Ext.core.DomHelper.insertBefore(insertBefore, config, returnDom !== true);
            }
            else {
                return Ext.core.DomHelper[!this.dom.firstChild ? 'insertFirst' : 'append'](this.dom, config, returnDom !== true);
            }
        },

        /**
         * Creates and wraps this element with another element
         * @param {Object} config (optional) DomHelper element config object for the wrapper element or null for an empty div
         * @param {Boolean} domNode (optional) True to return the raw DOM element instead of Ext.dom.Element
         * @return {HTMLElement/Ext.dom.Element} The newly created wrapper element
         */
        wrap: function(config, domNode) {
            var dom = this.dom,
                wrapper = this.self.create(config, domNode),
                wrapperDom = (domNode) ? wrapper : wrapper.dom,
                parentNode = dom.parentNode;

            if (parentNode) {
                parentNode.insertBefore(wrapperDom, dom);
            }

            wrapperDom.appendChild(dom);

            return wrapper;
        },

        wrapAllChildren: function(config) {
            var dom = this.dom,
                children = dom.childNodes,
                wrapper = this.self.create(config),
                wrapperDom = wrapper.dom;

            while (children.length > 0) {
                wrapperDom.appendChild(dom.firstChild);
            }

            dom.appendChild(wrapperDom);

            return wrapper;
        },

        unwrapAllChildren: function() {
            var dom = this.dom,
                children = dom.childNodes,
                parentNode = dom.parentNode;

            if (parentNode) {
                while (children.length > 0) {
                    parentNode.insertBefore(dom, dom.firstChild);
                }

                this.destroy();
            }
        },

        unwrap: function() {
            var dom = this.dom,
                parentNode = dom.parentNode,
                grandparentNode;

            if (parentNode) {
                grandparentNode = parentNode.parentNode;
                grandparentNode.insertBefore(dom, parentNode);
                grandparentNode.removeChild(parentNode);
            }
            else {
                grandparentNode = document.createDocumentFragment();
                grandparentNode.appendChild(dom);
            }

            return this;
        },

        /**
         * Inserts an html fragment into this element
         * @param {String} where Where to insert the html in relation to this element - beforeBegin, afterBegin, beforeEnd, afterEnd.
         * See {@link Ext.DomHelper#insertHtml} for details.
         * @param {String} html The HTML fragment
         * @param {Boolean} returnEl (optional) True to return an Ext.dom.Element (defaults to false)
         * @return {HTMLElement/Ext.dom.Element} The inserted node (or nearest related if more than 1 inserted)
         */
        insertHtml: function(where, html, returnEl) {
            var el = Ext.core.DomHelper.insertHtml(where, this.dom, html);
            return returnEl ? Ext.get(el) : el;
        }
    });