function manage_cart(task,item,qty) {
   var url = 'cart.php';
   var params = 'task=' + task + '&id=' + item + '&qty=' + qty;
   var ajax = new Ajax.Updater( {
     success: 'flash_notice' },
     url,
     { method: 'put', parameters: params, onComplete: reveal_flash, onFailure: report_error }
   );
}

function reveal_flash(request) {
  $('flash_notice').setStyle({ display: 'block' });
}


function report_error(request) {
  $('flash_error').setStyle({ display: 'block' });
  $('flash_error') = "An error occurred";
}