var imageFiles_5t_100 = new Array();
imageFiles_5t_100['0'] = new Array ('_images/5t_HEAD_DOWN.gif', '_images/5t_HEAD_DOWNMouseover.gif');

function image_on_5t_100 (position) {
   var doc = eval("document.image5t_100" + position);
   doc.src = imageFiles_5t_100[position][1];
}

function image_off_5t_100 (position) {
   var doc = eval("document.image5t_100" + position);
   doc.src = imageFiles_5t_100[position][0];
}