jQuery中使用each处理json数据

var obj = { id01:'true', id02:'flase', id03:'true'};

$.each(obj,function(key,val){ 
   if(val == 'true'){ 
      $('#' + key).addClass('focus'); 
    } 
});

[ 
{"Id": 10004, "PageName": "club"}, 
{"Id": 10040, "PageName": "qaz"}, 
{"Id": 10059, "PageName": "beauty"}
]

$.each(data, function(i, item) {
  alert(item.PageName);
});