<https://w3schools.invisionzone.com/topic/53171-problem-with-blur/#comment-292870>
<http://schema.org/text>
"ok, so how can i get the result that the new window will disappear, and the first window will be shown again? \nin disappear i dont mean minimize \n"
<https://w3schools.invisionzone.com/topic/53171-problem-with-blur/?tab=comments#comment-293006>