if (document.images) {
descriptionsoff = new Image
discountsoff = new Image
signupoff = new Image
scheduleoff = new Image
pycoff = new Image
galleryoff = new Image
demooff = new Image
ageoff = new Image
songsoff = new Image

descriptionson = new Image
discountson = new Image
signupon = new Image
scheduleon = new Image
pycon = new Image
galleryon = new Image
demoon = new Image
ageon = new Image
songson = new Image

descriptionsoff.src = "images/class_nav_descriptions.gif"
discountsoff.src = "images/class_nav_discounts.gif"
signupoff.src = "images/class_nav_signup.gif"
scheduleoff.src = "images/class_nav_schedule.gif"
pycoff.src = "images/class_nav_pyc.gif"
galleryoff.src = "images/class_nav_gallery.gif"
demooff.src = "images/class_nav_demo.gif"
ageoff.src = "images/class_nav_age.gif"
songsoff.src = "images/class_nav_songs.gif"

descriptionson.src = "images/class_nav_descriptions_r.gif"
discountson.src = "images/class_nav_discounts_r.gif"
signupon.src = "images/class_nav_signup_r.gif"
scheduleon.src = "images/class_nav_schedule_r.gif"
pycon.src = "images/class_nav_pyc_r.gif"
galleryon.src = "images/class_nav_gallery_r.gif"
demoon.src = "images/class_nav_demo_r.gif"
ageon.src = "images/class_nav_age_r.gif"
songson.src = "images/class_nav_songs_r.gif"

}
else {

descriptionsoff =  " "
discountsoff =  " "
signupoff =  " "
scheduleoff =  " "
pycoff =  " "
galleryoff =  " "
demooff =  " "
ageoff =  " "
songsoff =  " "

descriptionson =  " "
discountson =  " "
signupon =  " "
scheduleon =  " "
pycon =  " "
galleryon =  " "
demoon =  " "
ageon =  " "
songson =  " "

document.descriptions =  " "
document.discounts =  " "
document.signup =  " "
document.schedule =  " "
document.pyc =  " "
document.gallery =  " "
document.demo =  " "
document.age =  " "
document.songs =  " "
}