<!DOCTYPE html>
<html>
<head>
<script>
var myWindow;
function openWin() {
myWindow=window.open("", "", "width=400, height=200");
}
function moveWin() {
myWindow.moveBy(250, 250)
}
</script>
</head>
<body>
<input type="button" value="Open myWindow" onclick="openWin()" />
<br><br>
<input type="button" value="Move myWindow" onclick="moveWin()" />
</body>
</html>
