function orderCard(id){
    if(id == null){
        return;
    }
    var url = 'orderReaderCard.action';
    var params = 'cardId=' + id;
    var myAjax = new Ajax.Request(url,
        {
            method: 'post',
            parameters: params,
            onSuccess: onOrderCardSucceed,
            onFailure: onOrderCardFailed
        }
    )
}

function onOrderCardSucceed(request){
    var result = request.responseText.evalJSON();
    if(result.errorTip){
        alert("订购失败，请稍后重试");
    } else
        alert("订购成功，已添加到购物车中");
}

function onOrderCardFailed(request){
    alert("服务器内部错误，请稍后重试");
}