<html> <head> <script type="text/javascript"> var window_new = null; function NewWindow() { window_new = window.open('', '', 'width=500,height=300,top=400,left=100,scrollbars=yes'); return false; } function moveWindow(){ window_new.moveTo(500,0); window_new.focus(); } </script> </head> <body> <button type="button" onclick="NewWindow()">Mở cửa sổ</button> <button type="button" onclick="moveWindow()">Di chuyển ra vị trí mới</button> </body> </html>