问PayPal rest不工作

EN

env: 'sandbox', 

client: {
    sandbox:    'A Sandbox api key k',
    production: 'NONE'
},
commit: true, // Show a 'Pay Now' button

payment: function(data, actions) {

    return actions.payment.create({
        payment: {
            transactions: [
                {
                    item_list: 
                        {
                          items: test
                        }
                               ,
                    amount: amounthold
                }
            ]
        }
    });
},

onAuthorize: function(data, actions) {
    return actions.payment.execute().then(function(payment) {
        tansact = payment.transactions;
        details = payment.payer;
        runAjax("authoriseResult",tansact,details);

    });
},
onCancel: function(data) {
    jQuery('#checkoutHolder').html('<h1>The checkout failed please refresh the page and try again.</h1>');

    jQuery(".payPalButton").hide();

}