<!DOCTYPE html>
<html>
<body>
<p>Open a new window, and resize the width and height of the new window.</p>
<button onclick="openWin()">Create window</button>
<button onclick="resizeWinTo()">Resize the window to 800px * 600px</button>
<button onclick="resizeWinBy()">Make the new window smaller</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>