var imageFiles_90_31 = new Array();
imageFiles_90_31['0'] = new Array ('_images/90__Food_Give_away.gif', '_images/90__Food_Give_awayMouseover.gif');

function image_on_90_31 (position) {
   var doc = eval("document.image90_31" + position);
   doc.src = imageFiles_90_31[position][1];
}

function image_off_90_31 (position) {
   var doc = eval("document.image90_31" + position);
   doc.src = imageFiles_90_31[position][0];
}