function position() {
  hoehe=(document.body.clientHeight-containerHeight)/2;
  if (hoehe>0) { document.getElementById('container').style.marginTop=hoehe+'px'; }
}

function showmap(picture,width,height) {
  F1 = window.open('','Fenster','width='+width+',height='+height+',dependent=yes,location=no,menubar=no,resizable=no,scrollbars=no,status=no,toolbar=no')
  var str = '';
  str += '<html>';
  str += '<head>';
  str += '<title>Hotel Somont</title>';
  str += '</head>';
  str += '<body onclick="self.close();" style="background-image:url('+picture+');background-repeat:no-repeat;background-position:0px 0px;cursor:pointer;">';
  str += '</body>';
  str += '</html>';
  F1.document.write(str);
}

var pop = null;

function popdown() {
  if (pop && !pop.closed) pop.close();
}

function popup(obj,w,h) {
  var url = (obj.getAttribute) ? obj.getAttribute('href') : obj.href;
  if (!url) return true;
  w = (w) ? w += 20 : 150;  // 150px*150px is the default size
  h = (h) ? h += 25 : 150;
  var args = 'width='+w+',height='+h+',resizable,scrollbars';
  popdown();
  pop = window.open(url,'',args);
  return (pop) ? false : true;
}

window.onunload = popdown;
window.onfocus = popdown;