function addtocart (item, units) {
	new Request({
		url: base_path+'/shopcart/add/'+item+'/'+units+'/false/true',
		onSuccess: function(data){
			$('carrito').set('html', data.replace(/(.*)\|\|/, ''));
			$('article_num').set('html', data.replace(/\|\|(.*)/, ''));
		}
	}).send();
}