jQuery constructor recreation attempt

jConstruct.js

(function (window, undefined) {

var MRTN = (function() {
    
    // The main FeedTheWebDev function    
    var MRTN = function(element) {
            return new MRTN.fn.init(element, rootDoc);
    },
        // Ref to root document
        rootDoc;
        
    MRTN.fn = MRTN.prototype = {
        constructor: MRTN,
        init: function(element, rootDoc) {
        
            // Handle empty 'constructor'
            if (!element) {
                return this;
            }
            
             // It's a single element
            if (element.nodeType) {
                this.element = this[0] = element;
                this.length = 1;
                return this;
            }
        },
        splice : function () {},
        length: 0
    };
    
    MRTN.fn.init.prototype = MRTN.prototype;
    
    rootDoc = MRTN(document);
    
    return MRTN;

})();

window.MRTN = MRTN;
    
}(window));