if (document.images) {

  var tourOff = new Image(); // for the inactive image
  tourOff.src = "images/navTourOff.jpg";
  var tourOn = new Image(); // for the active image
  tourOn.src = "images/navTourOn.jpg";
  
  var bioOff = new Image(); // for the inactive image
  bioOff.src = "images/navBioOff.jpg";
  var bioOn = new Image(); // for the active image
  bioOn.src = "images/navBioOn.jpg";
  
  var musicOff = new Image(); // for the inactive image
  musicOff.src = "images/navMusicOff.jpg";
  var musicOn = new Image(); // for the active image
  musicOn.src = "images/navMusicOn.jpg";
  
  var mediaOff = new Image(); // for the inactive image
  mediaOff.src = "images/navMediaOff.jpg";
  var mediaOn = new Image(); // for the active image
  mediaOn.src = "images/navMediaOn.jpg";
  
  var forumOff = new Image(); // for the inactive image
  forumOff.src = "images/navForumOff.jpg";
  var forumOn = new Image(); // for the active image
  forumOn.src = "images/navForumOn.jpg";
  
  var contactOff = new Image(); // for the inactive image
  contactOff.src = "images/navContactOff.jpg";
  var contactOn = new Image(); // for the active image
  contactOn.src = "images/navContactOn.jpg";
  
  var linksOff = new Image(); // for the inactive image
  linksOff.src = "images/navLinksOff.jpg";
  var linksOn = new Image(); // for the active image
  linksOn.src = "images/navLinksOn.jpg";
  
}

function rollOff(imgName) {
 if (document.images) {
    document[imgName].src = eval(imgName + "Off.src");

}
}	

function rollOn(imgName) {
 if (document.images){
	document[imgName].src = eval(imgName + "On.src");
	
}
}

function high(which2){
theobject=which2
highlighting=setInterval("highlightit(theobject)",50)
}

function low(which2){
clearInterval(highlighting)
which2.filters.alpha.opacity=45
}

function highlightit(cur2){
if (cur2.filters.alpha.opacity<100)
cur2.filters.alpha.opacity+=5
else if (window.highlighting)
clearInterval(highlighting)
}

<!-- Picture Window (size) -->
function makeWin(Detail) {
        agent = navigator.userAgent;
        windowName = "1";
    url = Detail
        params = "";
        params += "toolbar=0,";
        params += "location=0,";
        params += "directories=0,";
        params += "status=0,";
        params += "menubar=0,";
        params += "scrollbars=0,";
        params += "resizable=0,";
        params += "width=500,";
        params += "height=370,";
      win = window.open(url, windowName, params);

}