var popUpWin=0;
function popUpWindow(URLStr, left, top, width, height) {

  if(left == 1) left = (screen.width/2) - width/2;
  if(top == 1) top = (screen.height/2) - height/2;

  if(popUpWin)
  {
    if(!popUpWin.closed) popUpWin.close();
  }
  if(popUpWin = open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'')){
	  	popUpWin.focus();
  } else {
		alert('Diese Seite wird in einem PopUp Fenster angezeigt.\nDeaktivieren Sie bitte Ihren PopUp Blocker.');  
  }
}

function bild(id) {
	seite = "openPic.php?id="+id+'&name=Unsere_Musikschule';
	popUpWindow(seite,1,1,100,100);
}