if (document.images) {
Inav_01_01 = new Image(177, 34);Inav_01_01.src = 'gifs/nav_author.gif';
Inav_01_01o = new Image(177, 34);Inav_01_01o.src = 'gifs/nav_author_over.gif';
Inav_02_01 = new Image(177, 36);Inav_02_01.src = 'gifs/nav_books.gif';
Inav_02_01o = new Image(177, 36);Inav_02_01o.src = 'gifs/nav_books_over.gif';
Inav_03_01 = new Image(177, 35);Inav_03_01.src = 'gifs/nav_events.gif';
Inav_03_01o = new Image(177, 35);Inav_03_01o.src = 'gifs/nav_events_over.gif';
Inav_04_01 = new Image(177, 36);Inav_04_01.src = 'gifs/nav_links.gif';
Inav_04_01o = new Image(177, 36);Inav_04_01o.src = 'gifs/nav_links_over.gif';
Inav_05_01 = new Image(177, 36);Inav_05_01.src = 'gifs/nav_mailing.gif';
Inav_05_01o = new Image(177, 36);Inav_05_01o.src = 'gifs/nav_mailing_over.gif';
Inav_06_01 = new Image(177, 35);Inav_06_01.src = 'gifs/nav_contact.gif';
Inav_06_01o = new Image(177, 35);Inav_06_01o.src = 'gifs/nav_contact_over.gif';

fourth = new Image(177, 17);fourth.src = 'gifs/nav_fourth.gif';
fourtho = new Image(177, 17);fourtho.src = 'gifs/nav_fourth_over.gif';
blue = new Image(177, 17);blue.src = 'gifs/nav_blue.gif';
blueo = new Image(177, 17);blueo.src = 'gifs/nav_blue_over.gif';
backbone = new Image(177, 17);backbone.src = 'gifs/nav_backbone.gif';
backboneo = new Image(177, 17);backboneo.src = 'gifs/nav_backbone_over.gif';
nickel = new Image(177, 17);nickel.src = 'gifs/nav_nickel.gif';
nickelo = new Image(177, 18);nickelo.src = 'gifs/nav_nickel_over.gif';
hatband = new Image(177, 18);hatband.src = 'gifs/nav_hatband.gif';
hatbando = new Image(177, 17);hatbando.src = 'gifs/nav_hatband_over.gif';
heat = new Image(177, 17);heat.src = 'gifs/nav_heat.gif';
heato = new Image(177, 17);heato.src = 'gifs/nav_heat_over.gif';
limited = new Image(177, 17);limited.src = 'gifs/nav_limited.gif';
limitedo = new Image(177, 17);limitedo.src = 'gifs/nav_limited_over.gif';
isolation = new Image(177, 18);isolation.src = 'gifs/nav_isolation.gif';
isolationo = new Image(177, 18);isolationo.src = 'gifs/nav_isolation_over.gif';
mongoose = new Image(177, 17);mongoose.src = 'gifs/nav_mongoose.gif';
mongooseo = new Image(177, 17);mongooseo.src = 'gifs/nav_mongoose_over.gif';
blackbird = new Image(177, 17);blackbird.src = 'gifs/nav_blackbird.gif';
blackbirdo = new Image(177, 17);blackbirdo.src = 'gifs/nav_blackbird_over.gif';
spoon = new Image(177, 17);spoon.src = 'gifs/nav_spoon.gif';
spoono = new Image(177, 17);spoono.src = 'gifs/nav_spoon_over.gif';
first = new Image(177, 17);first.src = 'gifs/nav_first.gif';
firsto = new Image(177, 17);firsto.src = 'gifs/nav_first_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;
  }
}