How to add request headers as array to window.open post url in javascript?

I have code something similar.

url : /files/docuemnttype/zipfile

window.open('POST', url, '_blank',{"reporttype" : [1,2,3,4,5]});

I am trying to send the reporttype array as request header in post call with window.open.

Can some one help me how this work.

Thanks!!

Source: AngularJS