Thanks for you answer i manage to load the scripts.

But I got openerp is not defined error :(

My scripts are defined as:

openerp.addons.mymodule = function (instance) {
instance.web.myfunc = instance.web.DatabaseManager.extend( {

something...

});};

What could be the problem?

SOLVED: It was the order in the html file :)

=========================

Sorry text on comment is unreadable.

I was able to reach this point, the NEW.js is loaded, if I set a break point in "var break_point;" it stops there, I don't get any error, but it just don't execute the rest of the code...

openerp.MYMODULE = function (instance) {
  /*just for test in a break point*/
  var break_point;

  /* redefine from chrome.js:412 */
  instance.web.DatabaseManagerNEW = instance.web.DatabaseManager.extend( {
    do_render: function() {
      this._super(parent);
      /* add new submit handler*/
      self.$el.find("form[name=NEW_db_form]").validate({ submitHandler: self.do_NEW });
    },
    do_NEW: function(form) {
      var self = this;
      var $form = $(form),
          fields = $form.serializeArray();
      self.rpc("/web/database/NEW", {'fields': fields}).done(function(result) {
          if (result.error) {
            self.display_error(result);
            return;
          }
          self.start();
      });
    },
 });

 /* redefine view_form.js:72 */
 instance.web.FormViewNEW = instance.web.FormView.extend({
   load_form: function(data) {
       this._super(parent);
       /* redefine button */
       if (!this.sidebar && this.options.$sidebar) {
           this.sidebar.add_items('other', _.compact([
           self.is_action_enabled('create') && { label: _t('NEW'), callback: self.on_button_NEW }
 ]));
       }
   },
   on_button_NEW: function() {
       var self = this;
       return this.has_been_loaded.then(function() {
       return self.dataset.call('copy', [self.datarecord.id, {}, self.dataset.context]).then(function(new_id) {
           self.record_created(new_id);
           self.to_edit_mode();
        });
     });
   },
 });
};

This code inserted in those files works, but not in my NEW.js file.