function views_javascript_random_views_pre_execute(&$view) {
  .....

  // Here it saves the current settings of the pager for use later
  .....

  // Set new settings
  $view->set_items_per_page($sorts['js_random']['client_node_count']);
}

function views_javascript_random_preprocess (&$vars, $hook) {
   ....
   dpm($vars);
}