<!--- 
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var img1 = new Image();
img1.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_intro_off.gif"
var img1on = new Image();
img1on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_intro_over.gif"

var img2 = new Image();
img2.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_thero_off.gif"
var img2on = new Image();
img2on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_thero_over.gif"

var img3 = new Image();
img3.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_sauro_off.gif"
var img3on = new Image();
img3on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_sauro_over.gif"

var img4 = new Image();
img4.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_trackways_off.gif"
var img4on = new Image();
img4on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_trackways_over.gif"

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img5.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_display_off.gif"
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img5on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_display_over.gif"

var img6 = new Image();
img6.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_liaoning_off.gif"
var img6on = new Image();
img6on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_liaoning_over.gif"

var img7 = new Image();
img7.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_extinction_off.gif"
var img7on = new Image();
img7on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_extinction_over.gif"

var img8 = new Image();
img8.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_epilogue_off.gif"
var img8on = new Image();
img8on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_epilogue_over.gif"

var img9 = new Image();
img9.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_meet_off.gif"
var img9on = new Image();
img9on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_meet_over.gif"

var img10 = new Image();
img10.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_behind_off.gif"
var img10on = new Image();
img10on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_behind_over.gif"

var img11 = new Image();
img11.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_off_paleointerviews.gif"
var img11on = new Image();
img11on.src = "/exhibitions/dinosaurs/images/exhibit/nav/navbut_over_paleointerviews.gif"

var unav1 = new Image();
unav1.src = "/exhibitions/dinosaurs/images/exhibit/homepage/but_sm_off_visitors.gif"
var unav1on = new Image();
unav1on.src = "/exhibitions/dinosaurs/images/exhibit/homepage/but_sm_on_visitors.gif"

var unav2 = new Image();
unav2.src = "/exhibitions/dinosaurs/images/exhibit/homepage/but_sm_off_pubprog.gif"
var unav2on = new Image();
unav2on.src = "/exhibitions/dinosaurs/images/exhibit/homepage/but_sm_on_pubprog.gif"

var unav3 = new Image();
unav3.src = "/exhibitions/dinosaurs/images/exhibit/homepage/but_sm_off_dinosedu.gif"
var unav3on = new Image();
unav3on.src = "/exhibitions/dinosaurs/images/exhibit/homepage/but_sm_on_dinosedu.gif"

var unav4 = new Image();
unav4.src = "/exhibitions/dinosaurs/images/exhibit/homepage/but_sm_off_credits.gif"
var unav4on = new Image();
unav4on.src = "/exhibitions/dinosaurs/images/exhibit/homepage/but_sm_on_credits.gif"

var dinotalk = new Image();
dinotalk.src = "/exhibitions/dinosaurs/images/exhibit/nav/but_dinotalk_off.gif"
var dinotalkon = new Image();
dinotalkon.src = "/exhibitions/dinosaurs/images/exhibit/nav/but_dinotalk_on.gif"

}

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");}
} 
//--->