Редактирование кода:
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<!DOCTYPE html> <html> <body> <button onclick="openWin()">Create new window</button> <button onclick="moveWinTo()">Move new window</button> <button onclick="moveWinBy()">Move the new window by 75 * 50px</button> <script> var myWindow; function openWin() { myWindow = window.open("", "", "width=250, height=250"); } function moveWinTo() { myWindow.moveTo(150, 150); myWindow.focus(); } function moveWinBy() { myWindow.moveBy(75, 50); myWindow.focus(); } </script> </body> </html>