if (document.images) {
  index_f4 = new Image(127 ,28); index_f4.src = "images/navbar/index_f4.gif";
  index_f1 = new Image(127 ,28); index_f1.src = "images/navbar/index.gif";
  accommodations_f2 = new Image(128 ,28); accommodations_f2.src = "images/navbar/accommodations_f2.gif";
  accommodations_f1 = new Image(128 ,28); accommodations_f1.src = "images/navbar/accommodations.gif";
  accommodations_f3 = new Image(128 ,28); accommodations_f3.src = "images/navbar/accommodations_f3.gif";
  activities_f2 = new Image(128 ,28); activities_f2.src = "images/navbar/activities_f2.gif";
  activities_f1 = new Image(128 ,28); activities_f1.src = "images/navbar/activities.gif";
  activities_f3 = new Image(128 ,28); activities_f3.src = "images/navbar/activities_f3.gif";
  }