<!DOCTYPE html>
<html>
<body>
<button onclick="OpenWindow()">Open Window</button>
<button onclick="CloseWindow()">Close Window</button>
<script>
var myWindow;
function OpenWindow() {
myWindow = window.open("", "", "width=300, height=200");
}
function CloseWindow() {
myWindow.close();
}
/*
run:
*/</script>
</body>
</html>