//Preload images to appear in navigation rollover
var myimages=new Array()
function preloadimages(){
for (i=0;i<preloadimages.arguments.length;i++){
myimages[i]=new Image()
myimages[i].src=preloadimages.arguments[i]
}
}

preloadimages("/images/join_on.jpg",
              "/images/join_off.jpg",
              "/images/start_on.jpg",
              "/images/start_off.jpg",
              "/images/bookmark_on.jpg",
              "/images/bookmark_off.jpg")

//Rollover image change in navigation
function highlightMenu(menuName,onORoff) {
 var whatToDo = eval("document.images."+menuName);
 whatToDo.src = "/images/"+menuName+(onORoff?"_on":"_off")+".jpg";
}