function manageCart(pId,pName,pNums) {
   var url = 'order.php';
   var ajax = new Ajax.Updater(
     {success: 'cartResult'},
              url,
              {method: 'get', parameters: {'act':'addCart','pId':pId,'pName':pName,'pNums':pNums}, onFailure: reportError,evalScripts:true});
}

function reportError(request) {
   $F('cartResult') = '<script type="text/javascript">sayMSG = function(){alert("An error occurred");}sayMSG();</script>';
}