var imageFiles_af_16 = new Array();
imageFiles_af_16['0'] = new Array ('_images/af_Reptile.gif', '_images/af_ReptileMouseover.gif');

function image_on_af_16 (position) {
   var doc = eval("document.imageaf_16" + position);
   doc.src = imageFiles_af_16[position][1];
}

function image_off_af_16 (position) {
   var doc = eval("document.imageaf_16" + position);
   doc.src = imageFiles_af_16[position][0];
}