if (document.images) {

var sidenav_productsA = new Image()
sidenav_productsA.src = "images/sidenav_products_off.gif"
var sidenav_productsZ = new Image()
sidenav_productsZ.src = "images/sidenav_products_on.gif"

var sidenav_physedA = new Image()
sidenav_physedA.src = "images/sidenav_physed_off.gif"
var sidenav_physedZ = new Image()
sidenav_physedZ.src = "images/sidenav_physed_on.gif"

var sidenav_cliniclibA = new Image()
sidenav_cliniclibA.src = "images/sidenav_cliniclib_off.gif"
var sidenav_cliniclibZ = new Image()
sidenav_cliniclibZ.src = "images/sidenav_cliniclib_on.gif"

var sidenav_corpinfoA = new Image()
sidenav_corpinfoA.src = "images/sidenav_corpinfo_off.gif"
var sidenav_corpinfoZ = new Image()
sidenav_corpinfoZ.src = "images/sidenav_corpinfo_on.gif"

var sidenav_generalinfoA = new Image()
sidenav_generalinfoA.src = "images/sidenav_generalinfo_off.gif"
var sidenav_generalinfoZ = new Image()
sidenav_generalinfoZ.src = "images/sidenav_generalinfo_on.gif"

var sidenav_employoppsA = new Image()
sidenav_employoppsA.src = "images/sidenav_employopps_off.gif"
var sidenav_employoppsZ = new Image()
sidenav_employoppsZ.src = "images/sidenav_employopps_on.gif"

var topnav_homeA = new Image()
topnav_homeA.src = "images/topnav_home_off.gif"
var topnav_homeZ = new Image()
topnav_homeZ.src = "images/topnav_home_on.gif"

var topnav_contactA = new Image()
topnav_contactA.src = "images/topnav_contact_off.gif"
var topnav_contactZ = new Image()
topnav_contactZ.src = "images/topnav_contact_on.gif"

var topnav_sitemapA = new Image()
topnav_sitemapA.src = "images/topnav_sitemap_off.gif"
var topnav_sitemapZ = new Image()
topnav_sitemapZ.src = "images/topnav_sitemap_on.gif"


}
function act(imgName) {
if (document.images)
document[imgName].src = eval(imgName + 'Z.src')
}

function inact(imgName) {
if (document.images)
document[imgName].src = eval(imgName + 'A.src')
}