var imageFiles_3d_21 = new Array();
imageFiles_3d_21['0'] = new Array ('_images/3d_Fish.gif', '_images/3d_FishMouseover.gif');

function image_on_3d_21 (position) {
   var doc = eval("document.image3d_21" + position);
   doc.src = imageFiles_3d_21[position][1];
}

function image_off_3d_21 (position) {
   var doc = eval("document.image3d_21" + position);
   doc.src = imageFiles_3d_21[position][0];
}