var neu = null;
function popup_einfach (url,windowname,xsize,ysize) {
    if (neu != null)
    {
        if (neu.closed != true)
        {
            neu.window.close();
        }
    }
    neu = window.open(url,windowname,'scrollbars,resizable,width='+xsize+',height='+ysize+'');
    if (navigator.appName == "Microsoft Internet Explorer")
    neu.moveTo((screen.width-xsize)/2,100);
}
function popup_vollbild (url,windowname,xsize,ysize)
{
    if (neu != null)
    {
        if (neu.closed != true)
        {
            neu.window.close();
        }
    }
    neu = window.open(url,windowname,'scrollbars,resizable,width='+xsize+',height='+ysize+'');
    if (navigator.appName == "Microsoft Internet Explorer")
    neu.moveTo((screen.width-xsize)/2,100);
}
function popup_nocontrol(url,windowname,xsize,ysize)
{
    if (neu != null)
    {
        if (neu.closed != true)
        {
            neu.window.close();
        }
    }
    neu = window.open(url,windowname,'resizable,width='+xsize+',height='+ysize+'');
    if (navigator.appName == "Microsoft Internet Explorer")
    neu.moveTo((screen.width-xsize)/2,100);
}

function popup_scroll(url,windowname,xsize,ysize) {
	if (windowname != null) {
		if (windowname.closed+"" != true && windowname.closed+"" != "undefined") {
			windowname.window.close();
		}
	}
    windowname = window.open(url,windowname,'scrollbars,resizable,width='+xsize+',height='+ysize+'');
    windowname.moveTo((screen.width-xsize)/2,100);
}
function popup_fullscreen(url, windowname)
{
var str = "left=0,screenX=0,top=0,screenY=0";
    if (window.screen)
    {
        var ah = screen.availHeight - 30;
        var aw = screen.availWidth - 10;
        str += ",height=" + ah;
        str += ",width=" + aw;
        str += ",scrollbars,resizable,location,menubar,status,tiltebar,toolbar";
    }
    neu =  window.open(url, windowname, str);
    neu.moveTo(0,0);
    neu.focus();
}
function popup_popup(url,windowname,xsize,ysize)
{
    var popupwinres;
    if (popupwinres != null)
    {
        if (popupwinres.closed != true)
        {
            popupwinres.window.close();
        }
    }
    popupwinres = window.open(url,windowname,'scrollbars=yes,resizable,width='+xsize+',height='+ysize+'');
    popupwinres.moveTo((screen.width-xsize)/2,100);
}



  function tetris()
  { var breite = 790;
    var hoehe = 500;
    var myLeft = (screen.availWidth - breite)/2;
    var myTop = (screen.availHeight - hoehe)/2;

    tetrispopup=window.open("tetris_set.htm?lang=de","tetrisfenster","width="+breite+",height="+hoehe+",left="+myLeft+",top="+myTop+",resizable=0,location=0,directories=0,status=1,menubar=0,scrollbars=0,toolbar=0");
    tetrispopup.focus();
  }
  
  function anleitung()
  { var breite = 650;
    var hoehe = 450;
    var myLeft = (screen.availWidth - breite)/2;
    var myTop = (screen.availHeight - hoehe)/2;
	    anleitungpopup=window.open("anleitung.htm","anleitungsfenster","width="+breite+",height="+hoehe+",left="+myLeft+",top="+myTop+",resizable=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,toolbar=0");
	    anleitungpopup.focus();
  }