Primary Key question

[eluser]codelearn[/eluser]
Hi guys,

Is there a way to use the "insert" function of active record, and then retrieve the "id" column immediately following creation.

Example:

$this->db->set('tagline',$this->input->post('tagline'));
$this->db->insert('group_group');

Now I want the ID of the row I just created... without using the tagline/where statement.

Thanks!