window.addEvent('load', function(){

      $('listadoPrincipal').getElements('a.amplia').each(function(el){

         el.addEvent('click', function(element){

			var imageLoader = new Element('img', {'src': './imagenes/iconos/ajax-loader.gif'});

			imageLoader.injectInside(this);

			var LinkString = el.id;

			var CategoriaId = LinkString.substr(5,LinkString.length);

			var url = "http://www.adictosacomprar.com/ajaxservices/ampliaCategoria.php?id_categoria="+CategoriaId;

			new Ajax(url, {method: 'post', data: $('altaTienda'), evalScripts: true}).request();

          })

      });

    });