<!--- 
if (document.images) {

var img1 = new Image();
img1.src = "/exhibitions/darwin/images/exhibit/nav/hnav_01.gif"
var img1on = new Image();
img1on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_01_over.gif"

var img2 = new Image();
img2.src = "/exhibitions/darwin/images/exhibit/nav/hnav_02.jpg"
var img2on = new Image();
img2on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_02_over.jpg"

var img3 = new Image();
img3.src = "/exhibitions/darwin/images/exhibit/nav/hnav_03.jpg"
var img3on = new Image();
img3on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_03_over.jpg"

var img4 = new Image();
img4.src = "/exhibitions/darwin/images/exhibit/nav/hnav_04.jpg"
var img4on = new Image();
img4on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_04_over.jpg"

var img5 = new Image();
img5.src = "/exhibitions/darwin/images/exhibit/nav/hnav_05.jpg"
var img5on = new Image();
img5on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_05_over.jpg"

var img6 = new Image();
img6.src = "/exhibitions/darwin/images/exhibit/nav/hnav_06.jpg"
var img6on = new Image();
img6on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_06_over.jpg"

var img7 = new Image();
img7.src = "/exhibitions/darwin/images/exhibit/nav/hnav_07.jpg"
var img7on = new Image();
img7on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_07_over.jpg"

var img8 = new Image();
img8.src = "/exhibitions/darwin/images/exhibit/nav/hnav_08.jpg"
var img8on = new Image();
img8on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_08_over.jpg"

var img10 = new Image();
img10.src = "/exhibitions/darwin/images/exhibit/nav/hnav_10.gif"
var img10on = new Image();
img10on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_10_over.gif"

var img11 = new Image();
img11.src = "/exhibitions/darwin/images/exhibit/nav/hnav_11.gif"
var img11on = new Image();
img11on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_11_over.gif"

var img12 = new Image();
img12.src = "/exhibitions/darwin/images/exhibit/nav/hnav_tortoise_cam.gif"
var img12on = new Image();
img12on.src = "/exhibitions/darwin/images/exhibit/nav/hnav_tortoise_cam_over.gif"

var unav1 = new Image();
unav1.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_visitor_info.jpg"
var unav1on = new Image();
unav1on.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_visitor_info_over.jpg"

var unav2 = new Image();
unav2.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_public_programs.jpg"
var unav2on = new Image();
unav2on.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_public_programs_over.jpg"

var unav3 = new Image();
unav3.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_glossary.jpg"
var unav3on = new Image();
unav3on.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_glossary_over.jpg"

var unav4 = new Image();
unav4.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_darwin_resources.jpg"
var unav4on = new Image();
unav4on.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_darwin_resources_ove.jpg"

var unav5 = new Image();
unav5.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_edu.jpg"
var unav5on = new Image();
unav5on.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_edu_over.jpg"

var unav6 = new Image();
unav6.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_collaborators.jpg"
var unav6on = new Image();
unav6on.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_collaborators_over.jpg"

var unav7 = new Image();
unav7.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_shop.jpg"
var unav7on = new Image();
unav7on.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_shop_on.jpg"

var unav8 = new Image();
unav8.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_credits.jpg"
var unav8on = new Image();
unav8on.src = "/exhibitions/darwin/images/exhibit/nav/h_unav_credits_over.jpg"

var video = new Image();
video.src = "/exhibitions/darwin/images/exhibit/homepage/watch_video.jpg"
var videoon = new Image();
videoon.src = "/exhibitions/darwin/images/exhibit/homepage/watch_video_over.jpg"

}

function imgon(name)  {
if (document.images){
document[name].src = eval(name + "on.src");}
}
function imgoff(name)  {
if (document.images){
document[name].src = eval(name + ".src");}
} 
//--->
