function zentriert()
{
var iMyWidth;
var iMyHeight;
iMyWidth = (window.screen.width/2) - (200 + 10)
iMyHeight = (window.screen.height/2) - (317 + 50)
var win2 = window.open("../kohkoodkarten/kohkoodkarte.htm","Fenster2","status,height=635,width=400,resizable=no,left=" + iMyWidth + ",top=" + iMyHeight + ",screenX=" + iMyWidth + ",screenY=" + iMyHeight + ",scrollbars=no")
}