var imageFiles_a5_7 = new Array();
imageFiles_a5_7['0'] = new Array ('_images/a5_Rodent.gif', '_images/a5_RodentMouseover.gif');

function image_on_a5_7 (position) {
   var doc = eval("document.imagea5_7" + position);
   doc.src = imageFiles_a5_7[position][1];
}

function image_off_a5_7 (position) {
   var doc = eval("document.imagea5_7" + position);
   doc.src = imageFiles_a5_7[position][0];
}