js open popup window and acces its element in another page

Question

I have a problem with js popup window.

I open a popup and try to access its elements in another page page, no success, and I don\'t want to reload the popup source,

Answer 1

Same origin (domain, port and protocol)?

Plain JS:

from page1

var popup = window.open("test.html","mypopup","width=500,height=300");
popup.document.getElementById("player").someFunction();

from page 2

var popup = window.open('','mypopup');
// now popup is known again
popup.document.getElementById("player").someFunction();