if (document.images) {

news_off = new Image();
news_off.src = "images/news.gif"
news_on = new Image();
news_on.src = "images/news_down.gif"

schedule_off = new Image();
schedule_off.src = "images/schedule.gif"
schedule_on = new Image();
schedule_on.src = "images/schedule_down.gif"

sponsors_off = new Image();
sponsors_off.src = "images/sponsors.gif"
sponsors_on = new Image();
sponsors_on.src = "images/sponsors_down.gif"

joe_off = new Image();
joe_off.src = "images/joe.gif"
joe_on = new Image();
joe_on.src = "images/joe_down.gif"

team_off = new Image();
team_off.src = "images/team.gif"
team_on = new Image();
team_on.src = "images/team_down.gif"

gallery_off = new Image();
gallery_off.src = "images/gallery.gif"
gallery_on = new Image();
gallery_on.src = "images/gallery_down.gif"

mylinks_off = new Image();
mylinks_off.src = "images/links.gif"
mylinks_on = new Image();
mylinks_on.src = "images/links_down.gif"

store_off = new Image();
store_off.src = "images/store.gif"
store_on = new Image();
store_on.src = "images/store_down.gif"

guestbook_off = new Image();
guestbook_off.src = "images/guestbook.gif"
guestbook_on = new Image();
guestbook_on.src = "images/guestbook_down.gif"

rides_off = new Image();
rides_off.src = "images/rides.gif"
rides_on = new Image();
rides_on.src = "images/rides_down.gif"

}

function buttonOff(imgName) {
   document[imgName].src = eval(imgName + "_off.src");
}

function buttonOn(imgName) {
   document[imgName].src = eval(imgName + "_on.src");
}