var imageFiles_co_22 = new Array();
imageFiles_co_22['0'] = new Array ('_images/co_Bird.gif', '_images/co_BirdMouseover.gif');

function image_on_co_22 (position) {
   var doc = eval("document.imageco_22" + position);
   doc.src = imageFiles_co_22[position][1];
}

function image_off_co_22 (position) {
   var doc = eval("document.imageco_22" + position);
   doc.src = imageFiles_co_22[position][0];
}