function hide_subnav() {
  $('subnav_communities').hide();
  $('subnav_costahomes').hide();
  $('subnav_consulting').hide();
  $('subnav_investors').hide();
  $('subnav_about').hide();
}
function swap_subnav(el_id) {
  hide_subnav();
  if(el_id!='') {
    $('subnav_'+el_id).show();
  }
}
function paginate(num) {
  $('page-1').hide();
  $('page-link-1').className="";
  $('page-2').hide();
  $('page-link-2').className="";
  $('page-3').hide();
  $('page-link-3').className="";
  Effect.Appear('page-'+num, { duration: 1.5 });
  $('page-link-'+num).className+=" on";
  return true;
}