$.ajax

  $.ajax({
                type: 'POST',
                url: 'server/login.ashx',
                dataType: "json",
                data: {
                    username: $('input[name="username"]').val(),
                    password: $('input[name="password"]').val()
                },
                success: function (d) {
                    if (!d.UserName) {
                        alert("账号或密码错误。")
                        return;
                    }
                    if ($('input[name="remember"]').prop("checked")) {
                        for (var k in d) {
                            $.cookie(k, d[k], { expires: 7 });
                        }
                    }
                    else {
                        for (var k in d) {
                            $.cookie(k, d[k]);
                        }
                    }
                  
                    window.location.href = 'index.html';
                },
                error: function (x, s, e) {
                    alert(e + 'error');
                }
            })