<!--if (document.images) {  var nav1n = new Image();  nav1n.src = "images/nav/nav1.gif";  var nav1a = new Image();  nav1a.src = "images/nav/nav1a.gif";  var nav2n = new Image();  nav2n.src = "images/nav/nav2.gif";  var nav2a = new Image();  nav2a.src = "images/nav/nav2a.gif";  var nav3n = new Image();  nav3n.src = "images/nav/nav3.gif";  var nav3a = new Image(); nav3a.src = "images/nav/nav3a.gif";  var nav4n = new Image();  nav4n.src = "images/nav/nav4.gif";  var nav4a = new Image();nav4a.src = "images/nav/nav4a.gif";}function act(imgName) {  if (document.images)     document.images[imgName].src = eval(imgName + "a.src");}function inact(imgName) {  if (document.images)    document.images[imgName].src = eval(imgName + "n.src");}// -->
