var imageFiles_iu_1 = new Array();
imageFiles_iu_1['0'] = new Array ('_images/iu_SOONER.gif', '_images/iu_SOONERMouseover.gif');

function image_on_iu_1 (position) {
   var doc = eval("document.imageiu_1" + position);
   doc.src = imageFiles_iu_1[position][1];
}

function image_off_iu_1 (position) {
   var doc = eval("document.imageiu_1" + position);
   doc.src = imageFiles_iu_1[position][0];
}