function loadpage(page) {
  var frame = document.getElementById("contentframe");
  switch (page) {
    case "News": frame.src="news.html";
                   break;
 
    case "Pictures": frame.src="pictures.html";
                     break;
 
    case "Video": frame.src="video.html";
                     break;
 
    case "Story": frame.src="story.html";
                       break;
 
    case "Guestbook": frame.src="guestbook.html";
                    break;
    
    case "Contact": frame.src="contact.html";
                    break;
                      
    case "Registration": window.parent.document.getElementById("contentframe").src="registration.php";
                    break;                                   
 
    default: frame.src="news.html"; 
  }

}