js获取对象的key

var obj = {"name":"名字","age":"18"};
var temp = "";
for(var i in obj){//用javascript的for/in循环遍历对象的属性
 ???temp += i+":"+obj[i]+"\n";
}
alert(temp);//结果：cid:C0 \n ctext:区县

js获取对象的key