$(document).ready(function() {

 // add URL to title of external links

 $('a[href^="http://"]').each(function() {
  $(this).attr('title', 'Go to ' + $(this).attr('href'));
 });
 
 // show/hide sections of catalogue

 $('ul.showHide').hide();
 $('h2.showHide').addClass('closed');
 $('h2.showHide').click(function() {
 $(this).toggleClass('open').toggleClass('closed').siblings('h2.showHide').removeClass('open').addClass('closed');
 $(this).next('ul.showHide').slideToggle('slow').siblings('ul.showHide:visible').hide('slow');
 });

});