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var people={"01":"X","02":"XX","03":"XXX"}
var people={"01":"X","02":"XX","03":"XXX"};
for(key in people){
alert(key+'='+people[key])
}
var key = "01";
people[key]
var people={"01":"X","02":"XX","03":"XXX"};
var key = "01";
alert(people[key]);