if (document.images) {
  home_f2 = new Image(75 ,23); home_f2.src = "images/home_f2.jpg";
  home_f1 = new Image(75 ,23); home_f1.src = "images/home.jpg";
  btn_about_f2 = new Image(95 ,23); btn_about_f2.src = "images/btn_about_f2.jpg";
  btn_about_f1 = new Image(95 ,23); btn_about_f1.src = "images/btn_about.jpg";
  btn_membership_f2 = new Image(118 ,23); btn_membership_f2.src = "images/btn_membership_f2.jpg";
  btn_membership_f1 = new Image(118 ,23); btn_membership_f1.src = "images/btn_membership.jpg";
  btn_news_f2 = new Image(134 ,23); btn_news_f2.src = "images/btn_news_f2.jpg";
  btn_news_f1 = new Image(134 ,23); btn_news_f1.src = "images/btn_news.jpg";
  btn_links_f2 = new Image(70 ,23); btn_links_f2.src = "images/btn_links_f2.jpg";
  btn_links_f1 = new Image(70 ,23); btn_links_f1.src = "images/btn_links.jpg";
  btn_contact_f2 = new Image(106 ,23); btn_contact_f2.src = "images/btn_contact_f2.jpg";
  btn_contact_f1 = new Image(106 ,23); btn_contact_f1.src = "images/btn_contact.jpg";
  btn_member_f2 = new Image(126 ,23); btn_member_f2.src = "images/btn_member_f2.jpg";
  btn_member_f1 = new Image(126 ,23); btn_member_f1.src = "images/btn_member.jpg";
  }