ajax传递的参数服务器端接受不到的原因

最常见的就是组织的json数据格式有问题，尝试把单引号改为双引号试试，如下：

$datares = {"uname":$uname.val(),"phone":$phone.val(),"city":$city,"bmoney":$bmoney.val(),"sex":$sex,"province":$province ,"city":$city,"trade":$trade,"timelime":$timelime,"btime":$btime,"buse":$buse};
        $.ajax({
            url         : '/test/a.php',
            type     : 'post',
            data     :$datares,
            dataType : 'json',
            //contentType: false,
            //processData: false,
            async    : false,
            success  : function(data)
            {
                if (data.status == 'success'){
                    alert(data.info);
                    location.reload();
                } else {
                    alert(data.info);
                }
            }
        });

以上是我今天遇到的问题，查了半天。