How Confirm before delete?

[eluser]bobbob[/eluser]
For deleting from the database I also use a a token to prevent cross site forgery requests. Very rare but they do happen.

Code:

function deleteCategory($id,$yn)
    {
        //verify admin first
        
        if($yn == $this->session->userdata('deletetoken')) {
            $this->db->where('id', $id);
            $this->db->delete('categories');
            $this->session->unset_userdata('deletetoken');
            redirect('admin');
            //delete
        }
        if($yn == 'no') {
            $token = substr(sha1(microtime()),4,30);
            $this->session->set_userdata('deletetoken', $token);
            echo 'Are you sure you want to delete the category?<br>';
            $url = "admin/deleteCategory/$id/$token";
            echo '<a href="'.site_url($url).'">YES</a>';
            $url = "admin/deleteCategory/$id/cancel";
            echo '<br><br><a href="'.site_url($url).'">CANCEL</a>';
            //get confirm
        }
        if($yn == 'cancel') {
            
            //do nothing and return
            redirect('admin');
        }
        
        
        
    }

This prevents a cross site forgery request as the token is unique each delete. Even better would be to do the same thing via Post