<html><body><p>打开一个新窗口，调整新窗口的宽度和高度。</p><button onclick="openWin()">创建窗口</button><button onclick="resizeWinTo()">将窗口大小调整为 800px * 600px</button><button onclick="resizeWinBy()">缩小新窗口</button><script>var myWindow;function openWin() { myWindow = window.open("", "", "width=250, height=250");}function resizeWinTo() { myWindow.resizeTo(800, 600); myWindow.focus();}function resizeWinBy() { myWindow.resizeBy(-100, -50); myWindow.focus();}</script></body></html>