function manageCart(task,item) {
   var url = '/js/managecart.php';
   var params = 'task=' + task + '&item=' + item;
   var ajax = new Ajax.Updater(
	          {success: 'cartResult'},
              url,
              {method: 'get', parameters: params, onFailure: reportError});
}

function reportError(request) {
   $F('cartResult') = "An error occurred";
}