ajax检测账户是否存在

Register.cshtml

<div title="账户">
     账户
   <input type="text" name="Acc_account" placeholder="账户" 
    onkeyup="this.value = this.value.replace(/[^\w\.\/]/ig, ''); is_account_exist(this.value);" />
 </div>

VerifyAccount.js

$(document).ready(function () {
$("#next_btn_01").click(function () {if (is_account_exist(acc_account)) return;
        }
//判断账户是否存在
function is_account_exist(acc_account) {
    var is_exist = false;
    Ajax.post(
        '/Account/CheckAccountIfExist',
        { Acc_account: acc_account },
        function (r) {
            is_exist = r.account_exist;
            if (is_exist) $('.next_error_01').show();
            else
                $('.next_error_01').hide();
        },
        undefined,
        false
        );

    return is_exist;
}
})

AccountControl.cs

        private IAccountService _accountService { get; set; }

        #region 检测账户是否存在

        public ActionResult CheckAccountIfExist(string Acc_account)
        {
            if (_accountService.GetByAccount(Acc_account) != null)
            {
                JsonResult["account_exist"] = true;
            }
            else
            {
                JsonResult["account_exist"] = false;
            }
            return Json(JsonResult);
        }
        #endregion