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<!DOCTYPE html> <html> <body> <p>Open "myWindow" and move the new window 250px relative to its current position:</p> <button onclick="openWin()">Open "myWindow"</button> <button onclick="moveWin()">Move "myWindow"</button> <script> var myWindow; function openWin() { myWindow = window.open("", "myWindow", "width=200, height=100"); myWindow.document.write("<p>This is 'myWindow'</p>"); } function moveWin() { myWindow.moveBy(250, 250); myWindow.focus(); } </script> </body> </html>