var imageFiles_10_31 = new Array();
imageFiles_10_31['0'] = new Array ('_images/10_Canned_Cat_Food.gif', '_images/10_Canned_Cat_FoodMouseover.gif');
imageFiles_10_31['1'] = new Array ('_images/10_Dry_Cat_Food.gif', '_images/10_Dry_Cat_FoodMouseover.gif');
imageFiles_10_31['2'] = new Array ('_images/10_Grain_Free.gif', '_images/10_Grain_FreeMouseover.gif');
imageFiles_10_31['3'] = new Array ('_images/10_Cat_Treats.gif', '_images/10_Cat_TreatsMouseover.gif');

function image_on_10_31 (position) {
   var doc = eval("document.image10_31" + position);
   doc.src = imageFiles_10_31[position][1];
}

function image_off_10_31 (position) {
   var doc = eval("document.image10_31" + position);
   doc.src = imageFiles_10_31[position][0];
}