ajax传单引号直接data error

     function ajaxSend() {
            $('#btnSend').attr('disabled', true)
            $.ajax({
                type: "Post",
                url: "Reader.aspx/GetStr",
                async: false,
                data: "{'s':'" + selectedText + "'}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (data) {
                    $('#Report').html(data.d);
                },
                error: function (err) {
                    alert("data error");
                }
            });
        }

function ajaxSend() {
$('#btnSend').attr('disabled', true)
$.ajax({
type: "Post",
url: "Reader.aspx/GetStr",
async: false,
data: {'s': selectedText },
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
$('#Report').html(data.d);
},
error: function (err) {
alert("data error");
}
});
}

 data: {s:selectedText},

data 里面的 不要加 引号