how can get output as infotable which is filtered result of another infotable?

var tableLength = infotable1.rows.length;
for (var x = 0; x < tableLength; x++) {

var row = infotable1.rows;

var newEntry = new Object();

var location = new Object();

location.latitude = parseInt(<lat>);

location.longitude = parseInt(<lon>);

location.elevation = 0;

location.units = "WGS84";

newEntry.location = location;

newEntry.datetime = row.datetime;

result.AddRow(newEntry);
}