<!DOCTYPE html>
<html>
<body>
<button onclick="openWin()">Create new window</button>
<button onclick="moveWinTo()">Move new window</button>
<button onclick="moveWinBy()">Move the new window by 75 * 50px</button>
<script>
var myWindow;
function openWin() {
myWindow = window.open("", "", "width=250, height=250");
}
function moveWinTo() {
myWindow.moveTo(150, 150);
myWindow.focus();
}
function moveWinBy() {
myWindow.moveBy(75, 50);
myWindow.focus();
}
</script>
</body>
</html>