if (document.images) {
allproff = new Image
proff = new Image
charbiosoff = new Image
summariesoff = new Image
resourcesoff = new Image
prodbiosoff = new Image
qaritaoff = new Image
fundingoff = new Image
contactoff = new Image

allpron = new Image
pron = new Image
charbioson = new Image
summarieson = new Image
resourceson = new Image
prodbioson = new Image
qaritaon = new Image
fundingon = new Image
contacton = new Image

allproff.src = "images/nav_allpr.gif"
proff.src = "images/nav_pr.gif"
charbiosoff.src = "images/nav_charbios.gif"
summariesoff.src = "images/nav_summaries.gif"
resourcesoff.src = "images/nav_resources.gif"
prodbiosoff.src = "images/nav_prodbios.gif"
qaritaoff.src = "images/nav_qarita.gif"
fundingoff.src = "images/nav_funding.gif"
contactoff.src = "images/nav_contact.gif"

allpron.src = "images/nav_allpr_r.gif"
pron.src = "images/nav_pr_r.gif"
charbioson.src = "images/nav_charbios_r.gif"
summarieson.src = "images/nav_summaries_r.gif"
resourceson.src = "images/nav_resources_r.gif"
prodbioson.src = "images/nav_prodbios_r.gif"
qaritaon.src = "images/nav_qarita_r.gif"
fundingon.src = "images/nav_funding_r.gif"
contacton.src = "images/nav_contact_r.gif"

}
else {

allproff = " "
proff = " "
charbiosoff = " "
summariesoff = " "
resourcesoff = " "
prodbiosoff = " "
qaritaoff = " "
fundingoff = " "
contactoff = " "

allpron = " "
pron = " "
charbioson = " "
summarieson = " "
resourceson = " "
prodbioson = " "
qaritaon = " "
fundingon = " "
contacton = " "


document.allpr =  " "
document.pr =  " "
document.charbios =  " "
document.summaries =  " "
document.resources =  " "
document.prodbios =  " "
document.qarita =  " "
document.funding =  " "
document.contact =  " "

}