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<!DOCTYPE html> <html> <head> <script> function myFunction() { alert("Thank you for visiting W3Schools!"); } </script> </head> <body onunload="myFunction()"> <h1>JavaScript HTML Events</h1> <h2>The onunload Attribute</h2> <h2>Welcome to my Home Page</h2> <p>Close this window or press F5 to reload the page.</p> </body> </html>
