function slide_topic() {
  new Effect.toggle('topic_slide_target', 'blind', {duration:'.25'});
  new Effect.toggle('topic_slide_down_arrow', 'appear', {duration:'.01'});
  new Effect.toggle('topic_slide_up_arrow', 'appear', {duration:'.01'});
}

function slide_archive() {
  new Effect.toggle('archive_slide_target', 'blind', {duration:'.25'});
  new Effect.toggle('archive_slide_down_arrow', 'appear', {duration:'.01'});
  new Effect.toggle('archive_slide_up_arrow', 'appear', {duration:'.01'});
}

function slide_blog() {
  new Effect.toggle('blog_slide_target', 'blind', {duration:'.25'});
  new Effect.toggle('blog_slide_down_arrow', 'appear', {duration:'.01'});
  new Effect.toggle('blog_slide_up_arrow', 'appear', {duration:'.01'});
}