javascript遍历json格式的数据

var list = {'list':[{"id":8,"password":"月月","username":"维吾尔"}, {"id":7,"password":"dfgsfdf","username":"dfdfdf"}, {"id":6,"password":"aaabbb","username":"aaaabbb"}, {"id":5,"password":"gfdfgdf","username":"fggegte"}, {"id":3,"password":"dfgfgrewr","username":"hahaha"}, {"id":2,"password":"fggfhgfh","username":"fddgfgh"}, {"id":1,"password":"hdghdgd","username":"dfsgss"}]};  for(var l in list){        alert(l+"  "+list[l]);    for(var c in list[l]){        alert(list[l][c].id+"  "+list[l][c].password+"  "+list[l][c].username);    }} for(var l in list){        alert(l+"  "+list[l]);    for(var c in list[l]){        for(var _c in list[l][c]){            alert(_c+"  "+list[l][c][_c]);        };    }} var li = [{"id":8,"password":"月月","username":"维吾尔"}, {"id":7,"password":"dfgsfdf","username":"dfdfdf"}, {"id":6,"password":"aaabbb","username":"aaaabbb"}, {"id":5,"password":"gfdfgdf","username":"fggegte"}, {"id":3,"password":"dfgfgrewr","username":"hahaha"}, {"id":2,"password":"fggfhgfh","username":"fddgfgh"}, {"id":1,"password":"hdghdgd","username":"dfsgss"}]; for(var i in li){    alert(i+"  "+li[i]);    for(var _i in li[i]){        alert(_i+"  "+li[i][_i]);    }   }