修改json对象的每一个值

function fun1(obj){ ???var names={}; ???????/*for in 可以用于数组或者对象*/ ?for(var name in obj){ ???????names[name] = obj[name].toLowerCase() ?} ??console.log(names); };var obj1 = {username: ‘NAME‘, password: ‘WOSHIDHS123‘};fun1(obj1);