if (document.images) {
nav1 = new Image();nav1.src = 'images/nav_author.gif';
nav1a = new Image();nav1a.src = 'images/nav_author_over.gif';
nav2 = new Image();nav2.src = 'images/nav_books.gif';
nav2a = new Image();nav2a.src = 'images/nav_books_over.gif';
nav3 = new Image();nav3.src = 'images/nav_other.gif';
nav3a = new Image();nav3a.src = 'images/nav_other_over.gif';
nav4 = new Image();nav4.src = 'images/nav_appearances.gif';
nav4a = new Image();nav4a.src = 'images/nav_appearances_over.gif';
nav5 = new Image();nav5.src = 'images/nav_contact.gif';
nav5a = new Image();nav5a.src = 'images/nav_contact_over.gif';
nav6 = new Image();nav6.src = 'images/nav_news.gif';
nav6a = new Image();nav6a.src = 'images/nav_news_over.gif';

subnav1 = new Image();subnav1.src = 'images/subnav_commoner.gif';
subnav1a = new Image();subnav1a.src = 'images/subnav_commoner_over.gif';
subnav2 = new Image();subnav2.src = 'images/subnav_claire.gif';
subnav2a = new Image();subnav2a.src = 'images/subnav_claire_over.gif';
subnav3 = new Image();subnav3.src = 'images/subnav_reservation.gif';
subnav3a = new Image();subnav3a.src = 'images/subnav_reservation_over.gif';
subnav4 = new Image();subnav4.src = 'images/subnav_bicycle.gif';
subnav4a = new Image();subnav4a.src = 'images/subnav_bicycle_over.gif';


}
function di(id,name){
  if (document.images) {document.images[id].src=eval(name+".src"); }
}

// function that displays status bar message

function dm(msgStr) {
  document.returnValue = false;
  if (document.images) { 
     window.status = msgStr;
     document.returnValue = true;
  }
}
var showMsg = navigator.userAgent != "Mozilla/4.0 (compatible; MSIE 4.0; Mac_PowerPC)";
function dmim(msgStr) {
  document.returnValue = false;
  if (showMsg) { 
    window.status = msgStr;
    document.returnValue = true;
  }
}