pastebin - collaborative debugging

/*
    A snippet with some methods I'm been playing with...

    Curious what people think of the method "createElementWithProps"... worth the overhead? Easier way to do it?
*/

    var FunctionObject = function() {

        var _e = [], _d = document;

        return {
            /**
             * Creates an element within the document, without a parent, as if by <code>document.createElement</code>. This method
             * has better performance in some browsers, as it caches instances of created objects and clones them, rather than manipulate the
             * document directly.
             * @param {String} t The tag name of the element to create.
             * @return {Node} A new element.
             *
             * @static
             * @function
             * @fullname Create Element
             */
            createElement : function (t) {
                var a = _e[t];
                if (!a) {
                    a = _e[t] = _d.createElement(t);
                }
                if (!a) {
                    return null;
                }
                else {
                    return a.cloneNode(false);
                }
            },

            /**
             * Creates an element within the document, without a parent, as if by <code>document.createElement</code>. Any
             * given properites will then be set onto the newly created element. This method has better performance, as it
             * caches instances of created objects and clones them, rather than manipulate the document directly.
             * @param {String} t The tag name of the element to create.
             * @param {Object} [p] The properties to set onto the created element, (e.g. <code>{ "href" : "index.html", "name" : "theName"}</code>).
             * @return {Node} A new element.
             *
             * @static
             * @function
             * @fullname Create Element with Properties
             */
            createElementWithProps : function (t, p) {
                var e = this.createElement(t);
                return this.mergeObjects(e, p);
            },

            /**
             * Merges two option objects.
             * @param {Object} o1 The option object to be modified.
             * @param {Object} o2 The option object containing properties to be copied.
             * @param {Boolean} d True if properties on o1 should be immutable, false otherwise.
             * @return {Object} An object containing properties.
             *
             * @static
             * @function
             * @fullname Merge Objects
             */
            mergeObjects : function (o1, o2, d) {
                o1 = o1 || {};
                o2 = o2 || {};
                var p;
                for (p in o2) {
                    if (p) {
                        o1[p] = (o1[p] === undefined) ? o2[p] : !d ? o2[p] : o1[p];
                    }
                }
                return o1;
            }
        };
    }();

    var alertAnchor = FunctionObject.createElementWithProps("A", {
        "href" : "#",
        "name" : "alertLink",
        "className" : "alert-me",
        "innerHTML" : "Click Me!",
        "onclick" : function() {
            alert('Hi!');
        }
    });