var obj = { id01:"true", id02:"flase", id03:"true"};$.each(obj,function(key,val){if(val == "true"){ $("#" + key).addClass("focus"); } });结果:ID为id01及id03的标签会添加一个class标签;[ {"Id": 10004, "PageName": "club"}, {"Id": 10040, "PageName": "qaz"}, {"Id": 10059, "PageName": "beauty"}]希望用jquery对此数据进行操作,使用$.each:$.each(data, function(i, item) {alert(item.PageName);});本人亲测可行。