<!DOCTYPE html>
<html>
<head>
<script>
var new_win;
function openWindow()
{
new_win = window.open("", "", "width = 500, height = 300");
}
function closeWindow()
{
new_win.close();
}
/*
run:
*/
</script>
<input type="button" value="Open Window" onclick="openWindow()" />
<input type="button" value="Close Window" onclick="closeWindow()" />
</body>
</html>