new file mode 100644
--- /dev/null
+++ b/functions.js
@@ -0,0 +1,73 @@
+var Error = function(s) {
+	this.error = s;
+	this.toString = function() {
+		return this.error;
+	};
+};
+
+var Item = function(service, node, id, payload) {
+	this.service = service;
+	this.node = node;
+	this.id = id;
+	this.payload = payload;
+	this.ns = payload.namespaceURI;
+};
+
+var verify = function(elem, ns, name, attributes, children) {
+	if (ns && elem.namespaceURI !== ns)
+		throw new Error('not the right namespace.');
+	if (name && elem.localName !== name)
+		throw new Error('not the right name.');
+	if (attributes)
+		for (var attribute in attributes) {
+			var value = attributes[attribute]
+			if (elem.getAttributeNS(null, attribute) !== value)
+				throw new Error('attribute '+attribute+' invalid.');
+		}
+	if (typeof children === 'number' && children < 2 && elem.children.length != children)
+		throw new Error('not the right number of children');
+};
+
+XMPP.prototype = {
+	discoInfo: function(aTo, aNode, aCallback) {
+		this.send(stanzas.discoInfo(aTo, aNode), function(answer){
+			aCallback(answer);
+		});
+	},
+
+	pubsubItems: function(aTo, aNode, aCallback) {
+		this.send(stanzas.pubsubItems(aTo, aNode), function(answer){
+			var items = [];
+			//try {
+				verify(answer, ns.j, 'iq', {type: 'result', from: aTo}, 1);
+
+				var pubsub = answer.firstChild;
+				verify(pubsub, ns.ps, 'pubsub', undefined, 1);
+
+				var items = pubsub.firstChild;
+				verify(items, ns.ps, 'items', {node: aNode});
+
+				var items = items.children;
+
+				var list = [];
+				for (var i in items) {
+					var node = items[i];
+					var id = node.getAttributeNS(null, 'id');
+					if (!id)
+						throw new Error('WARNING: invalid item! (no id)');
+
+					if (node.children.length != 1)
+						throw new Error('WARNING: invalid item! (more than one payload)');
+
+					var payload = node.firstChild;
+
+					list[id] = new Item(aTo, aNode, id, payload);
+				}
+			/*} catch (e) {
+				aCallback(e);
+			}*/
+			if(aCallback)
+				aCallback({service: aTo, node: aNode, items: list});
+		});
+	}
+};