javascript pop up getElementById, innerHTML, etc

     popup = window.open( "PTFACRPT/output/PTFinalEvalReportSOURCE.html", "", "status = 1, height = 400, width = 500, top = 200, left = 300, resizable = 1" )      
      alert(popup.getElementById("test").innerHTML)

This throws an err on the alert.
Can this work?
If so, how?
KeithMcElroyAsked:
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leakim971Connect With a Mentor PluritechnicianCommented:
popup = window.open( "PTFACRPT/output/PTFinalEvalReportSOURCE.html", "", "status = 1, height = 400, width = 500, top = 200, left = 300, resizable = 1" )      
setTimeout( function() { alert(popup.getElementById("test").innerHTML) }, 5000); // wait 5 second to be sure DOM of the popup is ready


the better way is to call a parent function from the popup with something like : window.onload = function() {   opener.parentFunction();  }
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