var imageFiles_y_10 = new Array();
imageFiles_y_10['0'] = new Array ('_images/y_GET_GIFT_CERTIFICATES.gif', '_images/y_GET_GIFT_CERTIFICATESMouseover.gif');

function image_on_y_10 (position) {
   var doc = eval("document.imagey_10" + position);
   doc.src = imageFiles_y_10[position][1];
}

function image_off_y_10 (position) {
   var doc = eval("document.imagey_10" + position);
   doc.src = imageFiles_y_10[position][0];
}