var imageFiles_ag_4 = new Array();
imageFiles_ag_4['0'] = new Array ('_images/ag_Fish.gif', '_images/ag_FishMouseover.gif');

function image_on_ag_4 (position) {
   var doc = eval("document.imageag_4" + position);
   doc.src = imageFiles_ag_4[position][1];
}

function image_off_ag_4 (position) {
   var doc = eval("document.imageag_4" + position);
   doc.src = imageFiles_ag_4[position][0];
}