function open_window(Adresse){
  var b = (screen.availWidth); 		//Fensterbreite
  var h = (screen.availHeight); 	//Fensterhöhe
  var fp = "";
  
  if (screen.availWidth < 800) {
	  b = screen.availWidth;}
  else b = 800;

  if (screen.availHeight < 768) {
	  h = screen.availHeight;}
  else h = 768;
  
  fp = fp + "width=" + b;
  fp = fp + ",height=" + h;
  fp = fp + ",left=" + (screen.availWidth-b);
  fp = fp + ",top=" + 0;
  fp = fp + ",location=no,scrollbars=yes,menubar=no,resizable=yes,status=no,toolbar=no";
  Fenster1 = window.open(Adresse, "blank", fp);
  Fenster1.focus();
  }

function allezu(){
   if (Fenster1 != null)
	  if(!Fenster1.closed){
	  	  Fenster1.close()
	  }
	}