function openWindow() {
iMyWidth = (window.screen.width/2) - (350 + 10)
iMyHeight = (window.screen.height/2) - (300 + 25)
Fokus = window.open("", "txt","height=600,width=700,resizable=no,left=" + iMyWidth + ",top=" + iMyHeight + ",screenX=" + iMyWidth + ",screenY=" + iMyHeight + ",scrollbars=no");
Fokus.focus()
}