第一个例子 
function custom_one_form_alter(&$form, &$form_state, $form_id)
{
  if('user_login' == $form_id){
    $form['#submit'][] = 'custom_one_user_login_redirect';
  }
}
    
function custom_one_user_login_redirect($form, &$form_state)
{
  $form_state['redirect'] = '<front>';
  return;
}
第二个例子 
function custom_one_form_alter(&$form, &$form_state, $form_id)
{
  if('user_login' == $form_id){
    $form['#submit'][] = 'custom_one_user_login_redirect';
  }
  if('cjdntj_node_form' == $form_id) {
      $form['actions']['submit']['#submit'][]= 'custom_one_cjdntj_node_submit_do_redirect';
//      $form['#redirect'] = array('list_cjdntj');
    }
function custom_one_cjdntj_node_submit_do_redirect($form, &$form_state){
    if($_GET['chang'] == 'A'){
        $form_state['redirect'] = 'list_a_cjdntj';
    }
    else{
        $form_state['redirect'] = 'list_cjdntj';
    }
}