function openWindow() {
iMyWidth = (window.screen.width/2) - (250 + 10)
iMyHeight = (window.screen.height/2) - (250 + 25)
Fokus = window.open("", "emw","width=500,height=500,resizable=no,left=" + iMyWidth + ",top=" + iMyHeight + ",screenX=" + iMyWidth + ",screenY=" + iMyHeight + ",scrollbars=no");
Fokus.focus()
}