<html><body><p>Open a new window, and decrease the new window's width by 50px, and increase the height by 50px.</p><p><b>Tip:</b> Click the "Resize window" button multiple times.</p><button onclick="openWin()">Create window</button><button onclick="resizeWin()">Resize window</button><script>var myWindow;function openWin() { myWindow = window.open("", "", "width=500, height=500");}function resizeWin() { myWindow.resizeBy(-50, 50); myWindow.focus();}</script></body></html>