Problem in input field search

Hello everybody.
I want to search data in input field from database If not match then i will type.
I implement this the codeigniter(without GC). i attach this image name is search.png. Here i search the "Title" input field.
Now when I implement this grocery crud ,it show an error.
My code is below:



function supplier_setup ()

{

  $this->grocery_crud->set_table('pos_supplier');

  $this->grocery_crud->set_subject('Supplier Setup');

  $this->grocery_crud->set_css('assets/grocery_crud/css/jquery_plugins/chosen/ci_functions.css');

   $this->grocery_crud->set_js('assets/grocery_crud/js/jquery_plugins/search/prototype.js');

  $this->grocery_crud->set_js('assets/grocery_crud/js/jquery_plugins/search/effects.js');

  $this->grocery_crud->set_js('assets/grocery_crud/js/jquery_plugins/search/controls.js');

  $this->grocery_crud->set_js('assets/grocery_crud/js/jquery_plugins/search/function_callback.js');

..................................................................

..................................................................

............................................

  $this->grocery_crud->callback_add_field('first_name',array($this,'add_field_callback_1'));

..................................... 

........................................

  $this->poscrud_output($output);

}





function add_field_callback_1()

{

	 return '<input type="text" id="first_name" name="first_name"><div id="autocomplete_first_name" class="autocomplete"></div>';

}

I attach the error image.(search_gc.png).

Anybody help please.

tofayelahmed