How to create a new $batch request to OData service from within javascript code

Hi,

I have HANA XS service (.xsjs file) from witch I need to send request to another OData service.

I know how to create GET odata request but we need to send $batch request using POST method.

Can somebody give me example for creation $batch http request with POST method in javascript code and sending it to OData service.

Thanks,

Alex.