var gtext = new Image();
var glarge = new Image();
var btext = new Image();
var blarge = new Image();
var ptext = new Image();
var plarge = new Image();
var stext = new Image();
var slarge = new Image();
var ctext = new Image();
var clarge = new Image();
var mtext = new Image();
var mlarge = new Image();

gtext.src = "/gfx/Gastropod1.jpg";
glarge.src = "/gfx/Gastropod2.jpg";
btext.src = "/gfx/Bivalve1.jpg";
blarge.src = "/gfx/Bivalve2.jpg";
ptext.src = "/gfx/Chiton1.jpg";
plarge.src = "/gfx/Chiton2.jpg";
stext.src = "/gfx/Scaphopod1.jpg";
slarge.src = "/gfx/Scaphopod2.jpg";
ctext.src = "/gfx/Cephalopod1.jpg";
clarge.src = "/gfx/Cephalopod2.jpg";
mtext.src = "/gfx/Monoplac1.jpg";
mlarge.src = "/gfx/Monoplac2.jpg";

function doButtons(textimage, picimage) {
document['text'].src=textimage;
document['picture'].src=picimage;
}