internet explorer - Javascript: I hear my alert but it's not showing in IE -

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i've got basic html page, has show javascript alert.

i hear sound it's supposed make when pops up, it's not popping up! don't see anywhere (in google chrome pop up). can continue working on page without clicking "ok" on (invisible) alert box, means isn't there!

any clues on how solve this? rebooted pc , disconnect multiple monitors.

<script>     alert('show!!'); </script>

more info:

  • my ie version ie11
  • the popup did work before, without making changes ie
  • on other websites, popup isn't showing aswell
  • i did reset ie properties (to factory default), no result
  • unable test on older versions
  • javascript enabled


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