  function menuhover(id,source)
   {
     document.getElementById(id).src='images/menu_'+source+'.gif';
   }
  function guestbook()
  {
     window.open("http://www.kuven.no/guestbook.php", "Guestbook", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,copyhistory=0,width=500,height=520");
  }
function youtuber(url) {
PreView = window.open("", "Youtube", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,copyhistory=0,width=500,height=400");
PreView.document.open();
PreView.document.write("<html>");
PreView.document.write("<head>");
PreView.document.write("<title>Preview</title>");
PreView.document.write("</head>");
PreView.document.write("<body>");
PreView.document.write("<center>");
PreView.document.write('<iframe title="YouTube video player" width="480" height="390" src="http://www.youtube.com/embed/' + url + '" frameborder="0" allowfullscreen></iframe>');
PreView.document.write("</center>");
PreView.document.write("</body>");
PreView.document.write("</html>");
PreView.document.close();
   }
  function page(filename)
  { oxmlhttp = null;
    try
      { oxmlhttp = new XMLHttpRequest();
        oxmlhttp.overrideMimeType("text/xml");
      }
    catch(e)
      { try
          { oxmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
          }
        catch(e)
          { return null;
          }
      }
    if(!oxmlhttp) return null;
    try
      { oxmlhttp.open("GET","pages/" + filename,false);
        oxmlhttp.send(null);
      }
    catch(e)
      { return null;
      }
    document.getElementById('rightside').innerHTML=oxmlhttp.responseText;
  }
