var imageFiles_f_15 = new Array();
imageFiles_f_15['0'] = new Array ('_images/f_About_Us.gif', '_images/f_About_UsMouseover.gif');

function image_on_f_15 (position) {
   var doc = eval("document.imagef_15" + position);
   doc.src = imageFiles_f_15[position][1];
}

function image_off_f_15 (position) {
   var doc = eval("document.imagef_15" + position);
   doc.src = imageFiles_f_15[position][0];
}