diff --git a/debian/changelog b/debian/changelog
index 7461d478..a5985820 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,4 @@
-hedera-web (1.337-deb8) stable; urgency=low
+hedera-web (1.340-deb8) stable; urgency=low
 
   * Initial Release.
 
diff --git a/web/js/db/calc-sum.js b/web/js/db/calc-sum.js
index 62707411..74bbebad 100644
--- a/web/js/db/calc-sum.js
+++ b/web/js/db/calc-sum.js
@@ -12,8 +12,8 @@ Db.CalcSum = new Class
 	
 		if (this._func)
 		{
-			this.form.row = row;
-			value = this._func (this.form);
+			this._set.row = row;
+			value = this._func (this._set);
 		}
 		else
 			value = this._model.getByIndex (row, this.columnIndex);
diff --git a/web/js/db/calc.js b/web/js/db/calc.js
index 50730051..69015430 100644
--- a/web/js/db/calc.js
+++ b/web/js/db/calc.js
@@ -21,8 +21,8 @@ Db.Calc = new Class
 					,'row-inserted': this.onRowInsert
 				});
 
-				var form = new Db.Form ({model: x});
-				this.link ({form: form});
+				var set = new Db.SimpleIterator ({model: x});
+				this.link ({_set: set});
 			}
 			,get: function ()
 			{
diff --git a/web/js/db/conn.js b/web/js/db/conn.js
index 0b0bff13..0385167d 100644
--- a/web/js/db/conn.js
+++ b/web/js/db/conn.js
@@ -28,8 +28,8 @@ Db.Conn.implement
 ({
 	Extends: Vn.Object
 
-	,connected: false
-	,requestsCount: 0
+	,_connected: false
+	,_requestsCount: 0
 
 	/**
 	 * Initilizes the connection object.
@@ -47,92 +47,71 @@ Db.Conn.implement
 	 * @param {Boolean} remember Specifies if the user should be remembered
 	 * @param {Function} openCallback The function to call when operation is done
 	 **/
-	,open: function (user, pass, remember, openCallback, guest)
+	,open: function (user, pass, remember, callback, guest)
 	{		
 		this.signalEmit ('loading-changed', true);
 
-		var request = new Vn.HttpRequest ();
-		request.add ({'action': 'login'});
-
 		if (user != null)
 		{
-			request.add
-			({
+			var params = {
 				 'user': user
 				,'password': pass
 				,'remember': remember
-			});
+			};
 		}
 		else if (guest)
-			request.add ({'guest': true});
+			var params = {'guest': true};
 
-		request.send ('rest.php',
-			this.opened.bind (this, request, openCallback));
+		var request = new Vn.JsonRequest ('login');
+		request.send (params,
+			this._onOpen.bind (this, callback));
 	}
 
 	/*
 	 * Called when open operation is done.
 	 */
-	,opened: function (request, openCallback, success)
+	,_onOpen: function (callback, request, json, error)
 	{
-		var error = null;
-		var openSuccess = false;
-
-		if (success)
-		try {
-			var json = request.getJson ();
-			openSuccess = json.data == true;
-			
-			if (json.error)
-				error = new Vn.Error (
-					json.error.domain,
-					json.error.code,
-					json.error.message);
-		}
-		catch (e)
-		{
-			error = e;
-		}
-
-		if (openSuccess)
-		{
-			this.connected = true;
-			this.signalEmit ('openned');
-		}
+		this._connected = json == true;
 
 		this.signalEmit ('loading-changed', false);
+	
+		if (this._connected)
+			this.signalEmit ('openned');
 		
-		if (openCallback)
-			openCallback (this, openSuccess, error);
+		if (error)
+			this.signalEmit ('error', error);
+		if (callback)
+			callback (this, this._connected, error);
 	}
 
 	/**
 	 * Closes the connection to the database.
 	 *
-	 * @param {Function} closeCallback The function to call when operation is done
+	 * @param {Function} callback The function to call when operation is done
 	 **/
-	,close: function (closeCallback)
+	,close: function (callback)
 	{
 		this.signalEmit ('loading-changed', true);
 
-		var request = new Vn.HttpRequest ();
-		request.add ({'action': 'logout'});
-		request.send ('rest.php',
-			this.closed.bind (this, closeCallback));
+		var request = new Vn.JsonRequest ('logout');
+		request.send (null,
+			this._onClose.bind (this, callback));
 	}
 
 	/*
 	 * Called when close operation is done.
 	 */
-	,closed: function (closeCallback)
+	,_onClose: function (callback, request, json, error)
 	{
-		this.connected = false;
-		this.signalEmit ('closed');
-		
+		this._connected = false;
 		this.signalEmit ('loading-changed', false);
+		this.signalEmit ('closed');
 
-		if (closeCallback)
-			closeCallback (this);
+		if (error)
+			this.signalEmit ('error', error);
+		if (callback)
+			callback (this, json == true, error);
 	}
 
 	/**
@@ -143,19 +122,14 @@ Db.Conn.implement
 	 **/
 	,execSql: function (sql, callback)
 	{
-		this.requestsCount++;
+		this._requestsCount++;
 		
-		if (this.requestsCount == 1)
+		if (this._requestsCount === 1)
 			this.signalEmit ('loading-changed', true);
 
-		var httpRequest = new Vn.HttpRequest ()
-		httpRequest.add
-		({
-			 'action': 'query'
-			,'sql': sql
-		});
-		httpRequest.send ('rest.php',
-			this.execDone.bind (this, httpRequest, callback));
+		var request = new Vn.JsonRequest ('query');
+		request.send ({'sql': sql},
+			this._onExec.bind (this, callback));
 	}
 	
 	/**
@@ -189,41 +163,25 @@ Db.Conn.implement
 	{
 		return new Date (value * 1000);
 	}
-	
+
 	/*
 	 * Called when a query is executed.
 	 */
-	,execDone: function (httpRequest, callback, success)
+	,_onExec: function (callback, request, json, error)
 	{
-		var e;
-		var error = null;
-		var results = null;
-
-		this.requestsCount--;
+		this._requestsCount--;
 		
-		if (this.requestsCount == 0)
+		if (this._requestsCount === 0)
 			this.signalEmit ('loading-changed', false);
 
-		if (!success)
-		{
-			error = new Vn.Error ('Conn', 'connError', _('ConnError'));
-			this.signalEmit ('error', error);
-		}
-		else
+		if (json)
 		try {
-			var json = httpRequest.getJson ();
-			results = json.data;
-			
-			if (json.error !== null)
-				error = new Vn.Error (json.error.domain,
-					json.error.code, json.error.message);
-
-			if (results instanceof Array)
-			for (var i = 0; i < results.length; i++)
-			if (results[i] !== true)
+			if (json && json instanceof Array)
+			for (var i = 0; i < json.length; i++)
+			if (json[i] !== true)
 			{
-				var data = results[i].data;
-				var columns = results[i].columns;
+				var data = json[i].data;
+				var columns = json[i].columns;
 
 				for (var j = 0; j < columns.length; j++)
 				{
@@ -254,13 +212,13 @@ Db.Conn.implement
 		{
 			error = e;
 		}
-		
+
 		if (error)
 			this.signalEmit ('error', error);
 
 		if (callback)
 		try {
-			callback (new Db.ResultSet (results, error));
+			callback (new Db.ResultSet (json, error));
 		}
 		catch (e)
 		{
diff --git a/web/js/db/main.js b/web/js/db/main.js
index 742d8350..16692b54 100644
--- a/web/js/db/main.js
+++ b/web/js/db/main.js
@@ -8,6 +8,7 @@ Vn.includeLib ('db',
 	,'result-set'
 	,'model'
 	,'iterator'
+	,'simple-iterator'
 	,'form'
 	,'param'
 	,'query'
diff --git a/web/js/db/simple-iterator.js b/web/js/db/simple-iterator.js
new file mode 100644
index 00000000..94af06c9
--- /dev/null
+++ b/web/js/db/simple-iterator.js
@@ -0,0 +1,70 @@
+/**
+ * A light iterator for models.
+ **/
+Db.SimpleIterator = new Class
+({
+	Extends: Vn.Object
+	,Implements: Db.Iterator
+	,Properties:
+	{
+		/**
+		 * The model associated to this form.
+		 **/
+		model:
+		{
+			type: Db.Model
+			,set: function (x)
+			{
+				this._model = x;
+			}
+			,get: function ()
+			{
+				return this._model;
+			}
+		},
+		/**
+		 * The row where the form positioned, has -1 if the row is unselected.
+		 **/
+		row:
+		{
+			type: Number
+			,set: function (x)
+			{
+				this._row = x;
+			}
+			,get: function ()
+			{
+				return this._row;
+			}
+		},
+		/**
+		 * The number of rows in the form.
+		 **/
+		numRows:
+		{
+			type: Number
+			,get: function ()
+			{
+				if (this._model)
+					return this._model.numRows;
+
+				return 0;
+			}
+		},
+		/**
+		 * Checks if the form data is ready.
+		 **/
+		ready:
+		{
+			type: Boolean
+			,get: function ()
+			{
+				if (this._model)
+					return this._model.ready;
+					
+				return false;
+			}
+		}
+	}
+});
+
diff --git a/web/js/hedera/app.js b/web/js/hedera/app.js
index e6d8d806..b24a723f 100644
--- a/web/js/hedera/app.js
+++ b/web/js/hedera/app.js
@@ -107,8 +107,6 @@ Vn.App = new Class
 		var error = new Error (message);
 		error.fileName = file;
 		error.lineNumber = line;
-
-		Htk.Toast.showError (_('There was an internal error'));
 		this._notifyError (error);
 	}
 	
@@ -123,16 +121,20 @@ Vn.App = new Class
 		switch (error.domain)
 		{
 			case 'Auth':
-				Htk.Toast.showError (_('You\'ve been too idle'));
+				if (error.code === 'badLogin')
+					Htk.Toast.showError (_('Invalid login'));
+				else if (error.code === 'sessionExpired')
+					Htk.Toast.showError (_('You\'ve been too idle'));
+
 				if (this._gui)
 					this._gui.logout ();
-				break;
+			break;
 			case 'Version':
 				this._newVersion (error);
-				break;
+			break;
 			case 'User':
 				Htk.Toast.showError (error.message);
-				break;
+			break;
 			default:
 				console.error (error.message);
 				Htk.Toast.showError (_('There was an internal error'));
@@ -140,7 +142,6 @@ Vn.App = new Class
 		else
 		{
 			console.error (error);
-			Htk.Toast.showError (_('There was an internal error'));
 			this._notifyError (error);
 		}
 	}
@@ -174,18 +175,20 @@ Vn.App = new Class
 	
 	,_notifyError: function (error)
 	{
-		if (error instanceof Error)
-		{
-			var httpRequest = new Vn.HttpRequest ()
-			httpRequest.add
-			({
-				 'file': error.fileName
-				,'line': error.lineNumber
-				,'message': error.message
-				,'stack': error.stack
-			});
-			httpRequest.send ('log.php');
-		}
+		Htk.Toast.showError (_('There was an internal error'));
+
+		var params = {
+			 'file': error.fileName
+			,'line': error.lineNumber
+			,'message': error.message
+			,'stack': error.stack
+		};
+	
+		var request = new XMLHttpRequest ();
+		request.open ('post', 'log.php', true);
+		request.setRequestHeader ('Content-Type',
+			'application/x-www-form-urlencoded');
+		request.send (Vn.Url.makeUri (params));
 	}
 	
 	,_freeLogin: function ()
diff --git a/web/js/hedera/login.js b/web/js/hedera/login.js
index 25ee22c1..12bbdb6f 100644
--- a/web/js/hedera/login.js
+++ b/web/js/hedera/login.js
@@ -92,10 +92,7 @@ Vn.Login = new Class
 		if (success)
 			this.signalEmit ('login');
 		else
-		if (error instanceof Vn.Error && error.domain === 'Auth')
-			Htk.Toast.showError (_('Invalid login'));
-
-		this._focusUserInput ();
+			this._focusUserInput ();
 	}
 });
 
diff --git a/web/js/hedera/tpv.js b/web/js/hedera/tpv.js
index 0f4dee97..33714bb6 100644
--- a/web/js/hedera/tpv.js
+++ b/web/js/hedera/tpv.js
@@ -34,22 +34,53 @@ Vn.Tpv = new Class
 	{	
 		if (amount > 0)
 		{
-			var request = new Vn.HttpRequest ();
-			request.add
-			({
-				 'action': 'tpv'
-				,'amount': parseInt (amount)
+			var params = {
+				 'amount': parseInt (amount)
 				,'urlOk': this._makeUrl ('ok')
 				,'urlKo': this._makeUrl ('ko')
 				,'company': company
-			});
+			};
 		
-			request.send ('rest.php',
-				this._onTransactionStart.bind (this, request));
+			var request = new Vn.JsonRequest ('tpv');
+			request.send (params,
+				this._onTransactionStart.bind (this));
 		}
 		else if (!isNaN (amount))
 			Htk.Toast.showError (_('AmountError'));
 	}
+
+	,_onTransactionStart: function (request, json, error)
+	{
+		if (json)
+		{
+			var form = document.createElement ('form');
+			form.method = 'post';
+			form.action = json.url;
+			document.body.appendChild (form);
+			
+			var fieldsMap =
+			{
+				 'Ds_SignatureVersion': 'HMAC_SHA256_V1'
+				,'Ds_MerchantParameters': json.params
+				,'Ds_Signature': json.signature
+			};
+
+			for (var field in fieldsMap)
+			{
+				var input = document.createElement ('input');
+				input.type = 'hidden';
+				input.name = field;
+				form.appendChild (input);
+				
+				if (fieldsMap[field])			
+					input.value = fieldsMap[field];
+			}
+			
+			form.submit ();
+		}
+		else
+			Htk.Toast.showWarning (_('PayError'));
+	}
 	
 	,retryPay: function ()
 	{
@@ -74,58 +105,6 @@ Vn.Tpv = new Class
 			Htk.Toast.showError (_('AmountError'));
 	}
 
-	,_onTransactionStart: function (request, success)
-	{
-		var data = null;
-		var error = null;
-	
-		if (success)
-		try {
-			var json = request.getJson ();
-			var data = json.data;
-			
-			if (json.error)
-				error = new Vn.Error (
-					json.error.domain,
-					json.error.code,
-					json.error.message);
-		}
-		catch (e)
-		{
-			error = e;
-		}
-
-		if (success && data)
-		{
-			var form = document.createElement ('form');
-			form.method = 'post';
-			form.action = data.url;
-			document.body.appendChild (form);
-			
-			var fieldsMap =
-			{
-				 'Ds_SignatureVersion': 'HMAC_SHA256_V1'
-				,'Ds_MerchantParameters': data.params
-				,'Ds_Signature': data.signature
-			};
-
-			for (var field in fieldsMap)
-			{
-				var input = document.createElement ('input');
-				input.type = 'hidden';
-				input.name = field;
-				form.appendChild (input);
-				
-				if (fieldsMap[field])			
-					input.value = fieldsMap[field];
-			}
-			
-			form.submit ();
-		}
-		else
-			Htk.Toast.showWarning (_('PayError'));
-	}
-
 	,_makeUrl: function (status, order)
 	{
 		var path = location.protocol +'//'+ location.host;
diff --git a/web/js/htk/grid.js b/web/js/htk/grid.js
index 36827778..4413ba81 100644
--- a/web/js/htk/grid.js
+++ b/web/js/htk/grid.js
@@ -23,8 +23,8 @@ Htk.Grid = new Class
 					,'updatable-changed': this.onUpdatableChange
 				});
 
-				var form = new Db.Form ({model: x});
-				this.link ({form: form});
+				var set = new Db.SimpleIterator ({model: x});
+				this.link ({_set: set});
 				
 				this.onUpdatableChange ();
 				this.onModelChange ();
@@ -61,7 +61,7 @@ Htk.Grid = new Class
 	}
 
 	,_model: null
-	,form: null
+	,_set: null
 	,columns: new Array ()
 	,internalColumn: null
 	,internalColumns: 0
@@ -120,8 +120,8 @@ Htk.Grid = new Class
 
 		if (column.renderer)
 		{
-			this.form.row = row;
-			column.renderer (column, this.form);
+			this._set.row = row;
+			column.renderer (column, this._set);
 		}
 
 		return column.render (tr);
diff --git a/web/js/htk/repeater.js b/web/js/htk/repeater.js
index bc78e34c..19d72b04 100644
--- a/web/js/htk/repeater.js
+++ b/web/js/htk/repeater.js
@@ -106,27 +106,27 @@ Htk.Repeater = new Class
 	
 	,getForm: function (index)
 	{
-		return this._childsData[index].form;
+		return this._childsData[index].set;
 	}
 	
 	,_buildBox: function (index)
 	{
-		var form = new Db.Form ({
+		var set = new Db.SimpleIterator ({
 			model: this._model,
 			row: index
 		});
 		
-		this._builder.add (this._formId, form);
+		this._builder.add (this._formId, set);
 		var res = this._builder.load ();
 		res.link ();
 
 		this._childsData.push ({
 			builder: res,
-			form: form
+			set: set
 		});
 		
 		if (this._renderer)
-			this._renderer (res, form);
+			this._renderer (res, set);
 			
 		return res.getMain ();
 	}
@@ -200,12 +200,17 @@ Htk.Repeater = new Class
 	{
 		Vn.Node.remove (this._container.childNodes[row]);
 		this._unrefChildData (row);
+		this._childsData.splice (row, 1);		
+		
+		for (var i = row; i < this._model.numRows; i++)
+			this._childsData[i].set.row = i;
+		
 		this._showNoRecordsFound ();
 	}
 
 	,_onRowUpdate: function (model, row, columns)
 	{
-//		this.form[row].signalEmit ('iter-changed');
+		this._childsData[row].set.iterChanged ();
 	}
 
 	,_onRowInsert: function (model, row)
@@ -224,7 +229,7 @@ Htk.Repeater = new Class
 	,_unrefChildData: function (index)
 	{
 		var childData = this._childsData[index];
-		childData.form.unref ();
+		childData.set.unref ();
 		childData.builder.unref ();
 	}
 	
diff --git a/web/js/vn/json-request.js b/web/js/vn/json-request.js
new file mode 100644
index 00000000..e6c8edd5
--- /dev/null
+++ b/web/js/vn/json-request.js
@@ -0,0 +1,68 @@
+/**
+ * Handler for JSON rest requests.
+ **/
+Vn.JsonRequest = new Class
+({
+	initialize: function (methodName)
+	{
+		this._methodName = methodName;
+	}
+
+	,send: function (params, callback)
+	{
+		var url = 'rest.php?action='+ encodeURIComponent (this._methodName);
+	
+		var request = new XMLHttpRequest ();
+		request.open ('post', url, true);
+		request.setRequestHeader ('Content-Type',
+			'application/x-www-form-urlencoded');
+		request.onreadystatechange =
+			this._onStateChange.bind (this, request, callback);
+		request.send (Vn.Url.makeUri (params));
+	}
+	
+	,_onStateChange: function (request, callback)
+	{
+		if (request.readyState !== 4)
+			return;
+
+		var jsData = null;
+		var error = null;
+
+		try {
+			if (request.status !== 200)
+				throw new Error (request.statusText);
+
+			var json = JSON.parse (request.responseText);
+			var jsData = json.data;
+			var jsError = json.error;
+
+			if (jsError)
+				throw new Vn.Error (
+					jsError.domain,
+					jsError.code,
+					jsError.message);
+		}
+		catch (e)
+		{
+			jsData = null;
+			error = e;
+		}
+
+		if (callback)
+			callback (this, jsData, error);
+	}
+	
+	,sendForm: function (form, callback)
+	{
+		var params = {};
+		var elements = form.elements;
+
+		for (var i = 0; i < elements.length; i++)
+		if (elements[i].name)
+			params[elements[i].name] = elements[i].value;
+
+		this.send (params, callback);
+	}
+});
+
diff --git a/web/js/vn/main.js b/web/js/vn/main.js
index 0a650f28..ec2c8ab6 100644
--- a/web/js/vn/main.js
+++ b/web/js/vn/main.js
@@ -16,6 +16,6 @@ Vn.includeLib ('vn',
 	,'hash-param'
 	,'node'
 	,'builder'
-	,'http-request'
+	,'json-request'
 ]);