function opwin(URL, breite, hoehe) {
    var wstat
    var ns4up = (document.layers) ? 1 : 0
    var ie4up = (document.all) ? 1 : 0
    var xsize = screen.width
    var ysize = screen.height
    var breite = breite
    var hoehe = hoehe
    var xpos = (xsize-breite)/2
    var ypos = (ysize-hoehe)/2
    
    wstat = window.open(URL, "detail", "scrollbars=no,status=no,toolbar=no,location=no,directories=no,resizable=no,menubar=no,width="+breite+",height="+hoehe+",screenX="+xpos+",screenY="+ypos+",top="+ypos+",left="+xpos)
}