diff --git a/src/model.js b/src/model.js
index da6f6e7d68..d75ca42451 100644
--- a/src/model.js
+++ b/src/model.js
@@ -120,8 +120,7 @@
             }
         };
         array.new_ = function(default_, id) {
-            var record = new Sao.Record(this.name, id);
-            record.model = this.model;
+            var record = new Sao.Record(this.model, id);
             record.group = this;
             if (default_) {
                 record.default_get();
@@ -159,26 +158,26 @@
             var idx = this.indexOf(record);
             if (record.id >= 0) {
                 if (remove) {
-                    if (record in this.record_deleted) {
+                    if (this.record_deleted.indexOf(record) != -1) {
                         this.record_deleted.splice(
                                 this.record_deleted.indexOf(record), 1);
                     }
                     this.record_removed.push(record);
                 } else {
-                    if (record in this.record_removed) {
+                    if (this.record_removed.indexOf(record) != -1) {
                         this.record_removed.splice(
                                 this.record_removed.indexOf(record), 1);
                     }
                     this.record_deleted.push(record);
                 }
             }
-            if (record.parent) {
-                record.parent._changed.id = true;
+            if (record.group.parent) {
+                record.group.parent._changed.id = true;
             }
             if (modified) {
                 record._changed.id = true;
             }
-            if (!(record.parent) || (record.id < 0) || force_remove) {
+            if (!(record.group.parent) || (record.id < 0) || force_remove) {
                 this._remove(record);
             }
             record.group.changed();
@@ -190,6 +189,14 @@
             var idx = this.indexOf(record);
             this.splice(idx, 1);
         };
+        array.unremove = function(record) {
+            this.record_removed.splice(this.record_removed.indexOf(record), 1);
+            this.record_deleted.splice(this.record_deleted.indexOf(record), 1);
+            record.group.changed();
+            record.group.root_group().screens.forEach(function(screen) {
+                screen.display();
+            });
+        };
         array.changed = function() {
             if (!this.parent) {
                 return;
@@ -685,6 +692,12 @@
         cancel: function() {
             this._loaded = {};
             this._changed = {};
+        },
+        deleted: function() {
+            return this.group.record_deleted.indexOf(this) != -1;
+        },
+        removed: function() {
+            return this.group.record_removed.indexOf(this) != -1;
         }
     });
 
@@ -782,8 +795,8 @@
         },
         get_context: function(record) {
             var context = jQuery.extend({}, record.get_context());
-            if (record.parent) {
-                jQuery.extend(context, record.parent.get_context());
+            if (record.group.parent) {
+                jQuery.extend(context, record.group.parent.get_context());
             }
             // TODO eval context attribute
             return context;
@@ -1302,7 +1315,7 @@
             for (var i = 0, len = record._values[this.name].length; i < len;
                     i++) {
                 var record2 = group[i];
-                if (!record2.deleted || !record2.removed)
+                if (!record2.deleted() || !record2.removed())
                     result.push(record2.get_on_change_value());
             }
             return result;
diff --git a/src/screen.js b/src/screen.js
index 052a46b79e..93c9b017e5 100644
--- a/src/screen.js
+++ b/src/screen.js
@@ -5,6 +5,10 @@
 
     Sao.ScreenContainer = Sao.class_(Object, {
         init: function(tab_domain) {
+            this.alternate_viewport = jQuery('<div/>', {
+                'class': 'screen-container'
+            });
+            this.alternate_view = false;
             this.tab_domain = tab_domain || [];
             this.el = jQuery('<div/>', {
                 'class': 'screen-container'
@@ -109,8 +113,14 @@
             }
         },
         set: function(widget) {
-            this.content_box.children().detach();
-            this.content_box.append(widget);
+            if (this.alternate_view) {
+                this.alternate_viewport.children().detach();
+                // TODO test if widget is content_box widget
+                this.alternate_viewport.append(widget);
+            } else {
+                this.content_box.children().detach();
+                this.content_box.append(widget);
+            }
         }
     });
 
@@ -124,6 +134,7 @@
             this.view_to_load = jQuery.extend([],
                 attributes.mode || ['tree', 'form']);
             this.views = [];
+            this.exclude_field = attributes.exclude_field;
             this.context = attributes.context || {};
             this.new_group();
             this.current_view = null;
@@ -143,9 +154,9 @@
             this.domain_parser = null;
         },
         load_next_view: function() {
-            if (this.view_to_load) {
+            if (!jQuery.isEmptyObject(this.view_to_load)) {
                 var view_id;
-                if (this.view_ids) {
+                if (!jQuery.isEmptyObject(this.view_ids)) {
                     view_id = this.view_ids.shift();
                 }
                 var view_type = this.view_to_load.shift();
@@ -263,11 +274,13 @@
         },
         set_group: function(group) {
             if (this.group) {
+                jQuery.extend(group.model.fields, this.group.model.fields);
                 this.group.screens.splice(
                         this.group.screens.indexOf(this), 1);
             }
             group.screens.push(this);
             this.group = group;
+            this.model = group.model;
             if (jQuery.isEmptyObject(group)) {
                 this.current_record = null;
             } else {
@@ -285,11 +298,19 @@
             if (this.views) {
                 this.search_active(['tree', 'graph', 'calendar'].indexOf(
                             this.current_view.view_type) > -1);
-                for (var i = 0; i < this.views.length; i++)
-                    if (this.views[i])
+                for (var i = 0; i < this.views.length; i++) {
+                    if (this.views[i]) {
                         this.views[i].display();
+                    }
+                }
             }
         },
+        display_next: function() {
+            // TODO
+        },
+        display_previous: function() {
+            // TODO
+        },
         default_row_activate: function() {
             if ((this.current_view.view_type == 'tree') &&
                     this.current_view.keyword_open) {
@@ -394,6 +415,12 @@
             // TODO test view modified
             return false;
         },
+        unremove: function() {
+            var records = this.current_view.selected_records();
+            records.forEach(function(record) {
+                record.group.unremove(record);
+            });
+        },
         remove: function(delete_, remove, force_remove) {
             var result = jQuery.Deferred();
             var records = null;
@@ -418,14 +445,14 @@
                 var prms = [];
                 if (delete_) {
                     records.forEach(function(record) {
-                        if (record.parent) {
-                            prms.push(record.parent.save());
+                        if (record.group.parent) {
+                            prms.push(record.group.parent.save());
                         }
-                        if (record in record.group.record_deleted) {
+                        if (record.group.record_deleted.indexOf(record) != -1) {
                             record.group.record_deleted.splice(
                                 record.group.record_deleted.indexOf(record), 1);
                         }
-                        if (record in record.group.record_removed) {
+                        if (record.group.record_removed.indexOf(record) != -1) {
                             record.group.record_removed.splice(
                                 record.group.record_removed.indexOf(record), 1);
                         }
@@ -443,7 +470,7 @@
             return result;
         },
         search_active: function(active) {
-            if (active && !this.parent) {
+            if (active && !this.group.parent) {
                 if (!this.fields_view_tree) {
                     this.model.execute('fields_view_get',
                             [false, 'tree'], this.context)
diff --git a/src/view.js b/src/view.js
index cf41649791..78739120b1 100644
--- a/src/view.js
+++ b/src/view.js
@@ -134,9 +134,12 @@
                         'width': child.getAttribute('width'),
                         'orientation': child.getAttribute('orientation'),
                         'float_time': child.getAttribute('float_time'),
-                        'pre_validate': child.getAttribute('pre_validate') == 1,
                         'completion': child.getAttribute('completion') == 1
                     };
+                    if (name == this.screen.exclude_field) {
+                        // TODO is it really the way to do it
+                        return;
+                    }
                     if (attributes.widget === null) {
                         attributes.widget = model.fields[name].description.type;
                     }
@@ -276,6 +279,11 @@
                 this.record.load(this.children_field).done(
                         add_children.bind(this));
             }
+            if (this.record.deleted() || this.record.removed()) {
+                this.el.css('text-decoration', 'line-through');
+            } else {
+                this.el.css('text-decoration', 'inherit');
+            }
         },
         toggle_row: function() {
             if (this.is_expanded()) {
@@ -508,7 +516,8 @@
                     'name': child.getAttribute('name'),
                     'widget': child.getAttribute('widget'),
                     'string': child.getAttribute('string'),
-                    'states': child.getAttribute('states')
+                    'states': child.getAttribute('states'),
+                    'mode': child.getAttribute('mode')
                 };
                 ['readonly', 'invisible'].forEach(function(name) {
                     if (child.getAttribute(name)) {
@@ -580,7 +589,11 @@
             var name = attributes.name;
             var text = attributes.string;
             if (name in model.fields) {
-                // TODO exclude field
+                if (name == this.screen.exclude_field) {
+                    container.add(
+                            Number(node.getAttribute('colspan') || 1));
+                    return;
+                }
                 if (!attributes.states && (name in model.fields)) {
                     attributes.states = model.fields[name].description.states;
                 }
@@ -642,8 +655,7 @@
         },
         _parse_field: function(model, node, container, attributes) {
             var name = attributes.name;
-            // TODO exclude field
-            if (!(name in model.fields)) {
+            if (!(name in model.fields) || name == this.screen.exclude_field) {
                 container.add(
                         Number(node.getAttribute('colspan') || 1));
                 return;
@@ -780,6 +792,12 @@
             } else {
                 this.screen.button(button.attributes);
             }
+        },
+        selected_records: function() {
+            if (this.screen.current_record) {
+                return [this.screen.current_record];
+            }
+            return [];
         }
     });
 
@@ -948,6 +966,10 @@
                 return Sao.View.Form.Text;
             case 'many2one':
                 return Sao.View.Form.Many2One;
+            case 'one2many':
+                return Sao.View.Form.One2Many;
+            case 'many2many':
+                return Sao.View.Form.Many2Many;
         }
     };
 
@@ -1519,4 +1541,401 @@
         }
     });
 
+    Sao.View.Form.One2Many = Sao.class_(Sao.View.Form.Widget, {
+        class_: 'form-one2many',
+        init: function(field_name, model, attributes) {
+            Sao.View.Form.One2Many._super.init.call(this, field_name, model,
+                attributes);
+
+            this.el = jQuery('<div/>', {
+                'class': this.class_
+            });
+            this.menu = jQuery('<div/>', {
+                'class': this.class_ + '-menu'
+            });
+            this.el.append(this.menu);
+
+            if (attributes.add_remove) {
+                this.wid_text = jQuery('<input/>', {
+                    type: 'input'
+                });
+                // TODO add completion
+
+                this.but_add = jQuery('<button/>').button({
+                    icons: {
+                        primary: 'ui-icon-plus'
+                    },
+                    label: 'Add'
+                });
+                this.but_add.click(this.add.bind(this));
+                this.menu.append(this.but_add);
+
+                this.but_remove = jQuery('<button/>').button({
+                    icons: {
+                        primary: 'ui-icon-minus'
+                    },
+                    label: 'Remove'
+                });
+                this.but_remove.click(this.remove.bind(this));
+                this.menu.append(this.but_remove);
+            }
+
+            this.but_new = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-document'
+                },
+                label: 'New'
+            });
+            this.but_new.click(this.new_.bind(this));
+            this.menu.append(this.but_new);
+
+            this.but_open = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-folder-open'
+                },
+                label: 'Open'
+            });
+            this.but_open.click(this.open.bind(this));
+            this.menu.append(this.but_open);
+
+            this.but_del = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-trash'
+                },
+                label: 'Delete'
+            });
+            this.but_del.click(this.delete_.bind(this));
+            this.menu.append(this.but_del);
+
+            this.but_undel = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-arrowreturn-1-s'
+                },
+                label: 'Undelete'
+            });
+            this.but_undel.click(this.undelete.bind(this));
+            this.menu.append(this.but_undel);
+
+            this.but_previous = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-arrowthick-1-w'
+                },
+                label: 'Previous'
+            });
+            this.but_previous.click(this.previous.bind(this));
+            this.menu.append(this.but_previous);
+
+            this.label = jQuery('<span/>', {
+                'class': this.class_ + '-label'
+            });
+            this.label.text('(0, 0)');
+            this.menu.append(this.label);
+
+            this.but_next = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-arrowthick-1-e'
+                },
+                label: 'Next'
+            });
+            this.but_next.click(this.next.bind(this));
+            this.menu.append(this.but_next);
+
+            this.but_switch = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-newwin'
+                },
+                label: 'Switch'
+            });
+            this.but_switch.click(this.switch_.bind(this));
+            this.menu.append(this.but_switch);
+
+            this.content = jQuery('<div/>', {
+                'class': this.class_ + '-content'
+            });
+            this.el.append(this.content);
+
+            var modes = (attributes.mode || 'tree,form').split(',');
+            this.screen = new Sao.Screen(attributes.relation, {
+                mode: modes,
+                view_ids: (attributes.view_ids || '').split(','),
+                views_preload: attributes.views || {},
+                row_activate: this.activate.bind(this),
+                exclude_field: attributes.relation_field || null
+            });
+            this.prm = this.screen.switch_view(modes[0]).done(function() {
+                this.content.append(this.screen.screen_container.el);
+            }.bind(this));
+            // TODO sensitivity of buttons
+        },
+        display: function(record, field) {
+            Sao.View.Form.One2Many._super.display.call(this, record, field);
+
+            this.prm.done(function() {
+                if (!record) {
+                    return;
+                }
+                if (field === undefined) {
+                    this.screen.new_group();
+                    this.screen.current_record = null;
+                    this.screen.parent = true;
+                    this.screen.display();
+                    return;
+                }
+
+                var new_group = record.field_get_client(this.field_name);
+                if (new_group != this.screen.group) {
+                    this.screen.set_group(new_group);
+                    // TODO handle editable tree
+                    // TODO set readonly, domain, size_limit
+                }
+                this.screen.display();
+            }.bind(this));
+        },
+        activate: function(event_) {
+            this.edit();
+        },
+        add: function(event_) {
+        },
+        remove: function(event_) {
+            // TODO model access
+            this.screen.remove(false, true, false);
+        },
+        new_: function(event_) {
+            // TODO model access
+            if (!this.validate()) {
+                return;
+            }
+            var context = jQuery.extend({},
+                    this.field().get_context(this.screen.current_record));
+            // TODO sequence
+            if (this.screen.current_view.type == 'form' ||
+                    this.screen.current_view.editable) {
+                this.screen.new_();
+                this.screen.current_view.el.prop('disabled', false);
+            } else {
+                var record = this.screen.current_record;
+                var field_size = record.expr_eval(this.attributes.size) || -1;
+                field_size -= this.field().get_eval(record);
+                var win = new Sao.Window.Form(this.screen, function() {}, {
+                    new_: true,
+                    many: field_size,
+                    context: context
+                });
+            }
+        },
+        open: function(event_) {
+            this.edit();
+        },
+        delete_: function(event_) {
+            // TODO model access
+            this.screen.remove(false, false, false);
+        },
+        undelete: function(event_) {
+            this.screen.unremove();
+        },
+        previous: function(event_) {
+            if (!this.validate()) {
+                return;
+            }
+            this.screen.display_previous();
+        },
+        next: function(event_) {
+            if (!this.validate()) {
+                return;
+            }
+            this.screen.display_next();
+        },
+        switch_: function(event_) {
+            this.screen.switch_view();
+            // TODO color_set
+        },
+        edit: function() {
+            // TODO model access
+            if (!this.validate()) {
+                return;
+            }
+            var record = this.screen.current_record;
+            if (record) {
+                var win = new Sao.Window.Form(this.screen, function() {});
+            }
+        },
+        validate: function() {
+            this.view.set_value();
+            var record = this.screen.current_record;
+            if (record) {
+                var fields = this.screen.current_view.get_fields();
+                if (!record.validate(fields)) {
+                    this.screen.display();
+                    return false;
+                }
+                // TODO pre-validate
+            }
+            return true;
+        }
+    });
+
+    Sao.View.Form.Many2Many = Sao.class_(Sao.View.Form.Widget, {
+        class_: 'form-many2many',
+        init: function(field_name, model, attributes) {
+            Sao.View.Form.Many2Many._super.init.call(this, field_name, model,
+                attributes);
+            this.el = jQuery('<div/>', {
+                'class': this.class_
+            });
+            this.menu = jQuery('<div/>', {
+                'class': this.class_ + '-menu'
+            });
+            this.el.append(this.menu);
+
+            var label = jQuery('<span/>', {
+                text: attributes.string
+            });
+            this.menu.append(label);
+
+            this.entry = jQuery('<input/>', {
+                type: 'input'
+            });
+            this.entry.on('keyup', this.key_press.bind(this));
+            this.menu.append(this.entry);
+
+            // TODO completion
+
+            this.but_add = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-plus'
+                },
+                text: false
+            });
+            this.but_add.click(this.add.bind(this));
+            this.menu.append(this.but_add);
+
+            this.but_remove = jQuery('<button/>').button({
+                icons: {
+                    primary: 'ui-icon-minus'
+                },
+                text: false
+            });
+            this.but_remove.click(this.remove.bind(this));
+            this.menu.append(this.but_remove);
+
+            this.content = jQuery('<div/>', {
+                'class': this.class_ + '-content'
+            });
+            this.el.append(this.content);
+
+            this.screen = new Sao.Screen(attributes.relation, {
+                mode: ['tree'],
+                view_ids: (attributes.view_ids || '').split(','),
+                views_preload: attributes.views || {},
+                row_activate: this.activate.bind(this)
+            });
+            this.prm = this.screen.switch_view('tree').done(function() {
+                this.content.append(this.screen.screen_container.el);
+            }.bind(this));
+        },
+        display: function(record, field) {
+            Sao.View.Form.Many2Many._super.display.call(this, record, field);
+
+            this.prm.done(function() {
+                if (!record) {
+                    return;
+                }
+                if (field === undefined) {
+                    this.screen.new_group();
+                    this.screen.current_record = null;
+                    this.screen.parent = true;
+                    this.screen.display();
+                    return;
+                }
+                var new_group = record.field_get_client(this.field_name);
+                if (new_group != this.screen.group) {
+                    this.screen.set_group(new_group);
+                }
+                this.screen.display();
+            }.bind(this));
+        },
+        activate: function() {
+            this.edit();
+        },
+        add: function() {
+            var dom;
+            var domain = this.field().get_domain(this.record());
+            var context = this.field().get_context(this.record());
+            var value = this.entry.val();
+            if (value) {
+                dom = [['rec_name', 'ilike', '%' + value + '%']].concat(domain);
+            } else {
+                dom = domain;
+            }
+
+            var callback = function(result) {
+                if (!jQuery.isEmptyObject(result)) {
+                    var ids = [];
+                    var i, len;
+                    for (i = 0, len = result.length; i < len; i++) {
+                        ids.push(result[i][0]);
+                    }
+                    this.screen.group.load(ids, true);
+                    this.screen.display();
+                }
+                this.entry.val('');
+            }.bind(this);
+            var model = new Sao.Model(this.attributes.relation);
+            var ids_prm = model.execute('search',
+                    [dom, 0, Sao.config.limit, null], context);
+            ids_prm.done(function(ids) {
+               if (ids.length != 1) {
+                   var win = new Sao.Window.Search(this.attributes.relation,
+                       callback, {
+                           sel_multi: true,
+                           ids: ids,
+                           context: context,
+                           domain: domain,
+                           view_ids: (this.attributes.view_ids ||
+                               '').split(','),
+                           views_preload: this.attributes.views || {},
+                           new_: this.attributes.create
+                   });
+               } else {
+                   callback([[ids[0], null]]);
+               }
+            }.bind(this));
+        },
+        remove: function() {
+            this.screen.remove(false, true, false);
+        },
+        key_press: function(event_) {
+            var editable = true; // TODO compute editable
+            var activate_keys = [Sao.common.TAB_KEYCODE];
+            if (!this.wid_completion) {
+                activate_keys.push(Sao.common.RETURN_KEYCODE);
+            }
+
+            if (event_.which == Sao.common.F3_KEYCODE) {
+                this.add();
+                event_.preventDefault();
+            } else if ((jQuery.inArray(event_.which, activate_keys) > -1) &&
+                    editable) {
+                if (this.entry.val()) {
+                    this.add();
+                }
+
+            }
+        },
+        edit: function() {
+            if (this.screen.current_record) {
+                var callback = function(result) {
+                    if (result) {
+                        this.screen.current_record.save().done(function() {
+                            this.screen.display();
+                        }.bind(this));
+                    } else {
+                        this.screen.current_record.cancel();
+                    }
+                };
+                var win = new Sao.Window.Form(this.screen,
+                        callback.bind(this));
+            }
+        }
+    });
 }());
diff --git a/src/window.js b/src/window.js
index e18c93d6a0..132767ea57 100644
--- a/src/window.js
+++ b/src/window.js
@@ -7,21 +7,27 @@
 
     Sao.Window.Form = Sao.class_(Object, {
         init: function(screen, callback, kwargs) {
+            kwargs = kwargs || {};
             this.screen = screen;
+            this.screen.screen_container.alternate_view = true;
             var view_type = kwargs.view_type || 'form';
+
+            var form_prm = jQuery.when();
             var screen_views = [];
-            for (var i = 0, len = this.screen.views; i < len; i++) {
+            for (var i = 0, len = this.screen.views.length; i < len; i++) {
                 screen_views.push(this.screen.views[i].view_type);
             }
             if (screen_views.indexOf(view_type) == -1 &&
                 this.screen.view_to_load.indexOf(view_type) == -1) {
-                this.screen.add_view_id(null, view_type);
+                form_prm = this.screen.add_view_id(null, view_type);
             }
-            var switch_prm = this.screen.switch_view(view_type);
-            switch_prm.done(function() {
-                if (kwargs.new_) {
-                    this.screen.new_();
-                }
+
+            var switch_prm = form_prm.then(function() {
+                return this.screen.switch_view(view_type).done(function() {
+                    if (kwargs.new_) {
+                        this.screen.new_();
+                    }
+                }.bind(this));
             }.bind(this));
             this.many = kwargs.many || 0;
             this.domain = kwargs.domain || null;
@@ -65,7 +71,7 @@
                     buttons: buttons,
                     title: '' // this.screen.current_view
                 });
-                this.el.append(this.screen.screen_container.content_box);
+                this.el.append(this.screen.screen_container.alternate_viewport);
                 this.el.dialog('open');
                 this.screen.display();
             }.bind(this));
@@ -126,13 +132,20 @@
 
             closing_prm.done(function() {
                 this.callback(result);
-                this.el.dialog('destroy');
+                this.destroy();
             }.bind(this));
+        },
+        destroy: function() {
+            this.screen.screen_container.alternate_view = false;
+            this.screen.screen_container.alternate_viewport.children()
+                .detach();
+            this.el.dialog('destroy');
         }
     });
 
     Sao.Window.Search = Sao.class_(Object, {
         init: function(model, callback, kwargs) {
+            kwargs = kwargs || {};
             var views_preload = kwargs.views_preload || {};
             this.model_name = model;
             this.domain = kwargs.domain || [];