jquery post方法中怎么将data解析后的值返回给函数

jquery post方法中如何将data解析后的值返回给函数？

JScript code

function citydp(id) {            var htmls = "";            $.post('/CallBack/SelectCityScenes.ashx',                { areaid: id, scene_type: "dp2" },                function b(data) {                    var val = eval(data);                    for (var js in val) {                        if (js == 'addRange' || js == 'clear') {                            continue;                        }                        htmls += '<div class="scenename"><a href="/SceneLists/ShowSecnce.aspx?photoid=' + val[js].id + '">';                        htmls += val[js].scenename + '</a></div>';                    }                    return b;                }            )        }