// JSON formatted record:( {"Records": [{"room_no":"100","room_id":"752"},{"room_no":"102","room_id":"753"},{"room_no":"103","room_id":"754"},], "RecordCount":"3" } )myRecords = eval(myJSON);var columnName1 = "room_no";var columnName2 = "room_id";for(i = 0; i < myRecords.RecordCount; i++){ alert(myRecords.Records[i].room_no); // This works alert(myRecords.Records[i].room_id); // This works alert(myRecords.Records[i].columnName1); // Does not work alert(myRecords.Records[i].columnName2); // Does not work}// Is it possible to address my object in such a way that I can use the value of a variable for my method name?