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<!DOCTYPE html> <html> <body> <p>Click the button to create a window and then display the name of the new window.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { var myWindow = window.open("", "MsgWindow", "width=200,height=100"); myWindow.document.write("<p>This window's name is: " + myWindow.name + "</p>"); } </script> </body> </html>