18     var $_start = 0;          // index of first user to be displayed  variable in admin_plugin_botbouncer_clean
94           $this->_start = $INPUT->int('start', 0);
104                           $this->_start = 0;
112           case 'start' : $this->_start = 0; break;
113           case 'prev'  : $this->_start -= $this->_pagesize; break;
114           case 'next'  : $this->_start += $this->_pagesize; break;
115           case 'last'  : $this->_start = $this->_user_total; break;
126         $user_list = $this->_auth->retrieveUsers($this->_start, $this->_pagesize, $this->_filter);
134         if ($this->_start >= $this->_user_total) {
135           $this->_start = $this->_user_total - $this->_pagesize;
137         if ($this->_start < 0) $this->_start = 0;
139         $this->_last = min($this->_user_total, $this->_start + $this->_pagesize);