function openWindow(url) {

    winWidth=579;
    winHeight=420;
	
    breite = screen.width - 0;
    hoehe = screen.height - 0;
    
    px = breite/2-(winWidth/2)-5;
    py = hoehe/2-(winHeight/2)-5;
    day = new Date();
    id = day.getTime();
    wndProps = "top="+py+",left="+px+",width="+winWidth+",height="+winHeight+",dependant=yes,scrollbars=no,resizable=no";

    eval("myWnd" + id + " = window.open(url,'Diddl',wndProps);");
}