if (document.images) {
  nav301_f1 = new Image(180 ,11); nav301_f1.src = "/images/nav3/nav3-01.gif";
  nav302_f2 = new Image(180 ,25); nav302_f2.src = "/images/nav3/nav3-02-over.gif";
  nav302_f1 = new Image(180 ,25); nav302_f1.src = "/images/nav3/nav3-02.gif";
  nav303_f2 = new Image(180 ,25); nav303_f2.src = "/images/nav3/nav3-03-over.gif";
  nav303_f1 = new Image(180 ,25); nav303_f1.src = "/images/nav3/nav3-03.gif";
  nav304_f2 = new Image(180 ,26); nav304_f2.src = "/images/nav3/nav3-04-over.gif";
  nav304_f1 = new Image(180 ,26); nav304_f1.src = "/images/nav3/nav3-04.gif";
  nav305_f2 = new Image(180 ,24); nav305_f2.src = "/images/nav3/nav3-05-over.gif";
  nav305_f1 = new Image(180 ,24); nav305_f1.src = "/images/nav3/nav3-05.gif";
  nav306_f2 = new Image(180 ,25); nav306_f2.src = "/images/nav3/nav3-06-over.gif";
  nav306_f1 = new Image(180 ,25); nav306_f1.src = "/images/nav3/nav3-06.gif";
  nav307_f2 = new Image(180 ,38); nav307_f2.src = "/images/nav3/nav3-07-over.gif";
  nav307_f1 = new Image(180 ,38); nav307_f1.src = "/images/nav3/nav3-07.gif";
  nav308_f2 = new Image(180 ,24); nav308_f2.src = "/images/nav3/nav3-08-over.gif";
  nav308_f1 = new Image(180 ,24); nav308_f1.src = "/images/nav3/nav3-08.gif";
  nav309_f2 = new Image(180 ,26); nav309_f2.src = "/images/nav3/nav3-09-over.gif";
  nav309_f1 = new Image(180 ,26); nav309_f1.src = "/images/nav3/nav3-09.gif";
  nav310_f2 = new Image(180 ,53); nav310_f2.src = "/images/nav3/nav3-10-over.gif";
  nav310_f1 = new Image(180 ,53); nav310_f1.src = "/images/nav3/nav3-10.gif";
  nav311_f2 = new Image(180 ,24); nav311_f2.src = "/images/nav3/nav3-11-over.gif";
  nav311_f1 = new Image(180 ,24); nav311_f1.src = "/images/nav3/nav3-11.gif";
  nav312_f2 = new Image(180 ,24); nav312_f2.src = "/images/nav3/nav3-12-over.gif";
  nav312_f1 = new Image(180 ,24); nav312_f1.src = "/images/nav3/nav3-12.gif";
  nav313_f2 = new Image(180 ,25); nav313_f2.src = "/images/nav3/nav3-13-over.gif";
  nav313_f1 = new Image(180 ,25); nav313_f1.src = "/images/nav3/nav3-13.gif";
  nav314_f1 = new Image(180 ,25); nav314_f1.src = "/images/nav3/nav3-14.gif";
  }