Javascript LinkedList (not tested!)

linkedList.js

var node = function(text) {
	var pointers = { _next: null };
	var data = { text: null };
	var _const = function() {
		this.data.text = text;
	};

	if(!!text) _const();

	return {
		getText: function(text) {
			return !!data.text ? data.text : null;
		},
		setText: function(text) {
			if(!!text) data.text = text;
		},
		getNext: function() {
			return !!pointers._next ? pointers._next : null;
		},
		setNextNode: function(node) {
			if(!!pointers._next) pointers._next = node;
		}
	};
};

var linkedList = function(node) {
	var list = {
		_start:null,
		_prev:null,
		_current:null,
		_getNextNode:function () {
			if (list._start === null) return null;
			list._prev = list._current;
			list._current = list._current.getNext();
			return list._current;
		},
		_resetNodes:function () {
			list._current = list._start;
			list._prev = null;
		}
	};

	list._start = !!node ? node : new node("");
	list._current = list._start;

	return {
		getCurrentNode: function() {
			return list._current;
		},
		deleteNode:function (text) {
			if (list._start === null || text === null) return;
			list._current = list._start;
			do {
				if (list._current.getText() === text)
					list._prev.setNextNode(list._getNextNode());
			} while (list._getNextNode() !== null);
		},
		addNode:function (text) {
			var text = text || '';
			while (list._getNextNode() !== null) {
			}
			list._current.setNextNode(new Node(text));
		},
		findNode:function (text) {
			if (list._start === null) return null;
			var targetNode = null;
			do {
				if (list._current.getText() === text) targetNode = list._current;
			} while (list._getNextNode() !== null);
			return targetNode;
		}
	};
};