var imageFiles_ag_13 = new Array();
imageFiles_ag_13['0'] = new Array ('_images/ag_Fish.gif', '_images/ag_FishMouseover.gif');

function image_on_ag_13 (position) {
   var doc = eval("document.imageag_13" + position);
   doc.src = imageFiles_ag_13[position][1];
}

function image_off_ag_13 (position) {
   var doc = eval("document.imageag_13" + position);
   doc.src = imageFiles_ag_13[position][0];
}