/* This is so unobtrusive, it's not even on your screen. */
$j = jQuery.noConflict();
jQuery.fn.bt_activate = function(panel,e) {
  this.click(function(e){
    $j(panel).siblings().fadeOut('fast',function(){
      $j(panel).animate({opacity: 1.0},500).fadeIn('slow');
    });
    $j('ul.leftnav_main li').removeClass('selected');
    $j(e.target).parent().addClass('selected');
    e.preventDefault();
    return false;}
  );
  return this
}