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Continue to ChatJava Script: Closing child window or tab on parent window closing or refreshing https://www.mytecbits.com/internet/java-script/closing-child-window-or-tab-on-parent-window-closing
Java Script: Closing child window or tab on parent window closing or refreshing https://www.mytecbits.com/internet/java-script/closing-child-window-or-tab-on-parent-window-closing