Method of Traversing Map Object in js

Method of Traversing Map Objects in js

console.log(jsonData);// Firefox console printout:  Object { fileNumber=" Document number ", fileName=" File name "}

for(var key in jsonData)
  console.log(" Attributes: " + key + ", Value: "+ jsonData[key]);
}

Printout:

Attribute: fileNumber, Value: File number

Attribute: fileName, Value: File name