javascript - How to check whetherpop up blocker is turned ON or not in a browser using Code ? -

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how check whether pop blocker turned on or not in browser using java or java script code ?

function check () {     document.login.action= url+"test.jsp";     document.login.submit(); }

i call function on click of submit button

how about:

var mywindow = window.open (url);  if (if (mywindow == null || typeof(mywindow )=='undefined')) {      // popup blocker enabled } else {      mywindow.close(); }

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