if (document.images) {
aboutoff = new Image
pressoff = new Image
performancesoff = new Image
contactoff = new Image
watchoff = new Image

abouton = new Image
presson = new Image
performanceson = new Image
contacton = new Image
watchon = new Image

aboutoff.src = "images/nav_about.gif"
pressoff.src = "images/nav_press.gif"
performancesoff.src = "images/nav_performances.gif"
contactoff.src = "images/nav_contact.gif"
watchoff.src = "images/nav_watch.gif"

abouton.src = "images/nav_about_r.gif"
presson.src = "images/nav_press_r.gif"
performanceson.src = "images/nav_performances_r.gif"
contacton.src = "images/nav_contact_r.gif"
watchon.src = "images/nav_watch_r.gif"

}
else {

aboutoff =  " "
pressoff =  " "
performancesoff =  " "
contactoff =  " "
watchoff =  " "

abouton =  " "
presson =  " "
performanceson =  " "
contacton =  " "
watchon =  " "

document.about =  " "
document.press =  " "
document.performances =  " "
document.contact =  " "
document.watch =  " "

}