var imageFiles_s16f_28 = new Array();
imageFiles_s16f_28['0'] = new Array ('_images/s16f_Home.gif', '_images/s16f_HomeMouseover.gif');
imageFiles_s16f_28['1'] = new Array ('_images/s16f_About_NWFS.gif', '_images/s16f_About_NWFSMouseover.gif');
imageFiles_s16f_28['2'] = new Array ('_images/s16f_Contact_Us.gif', '_images/s16f_Contact_UsMouseover.gif');
imageFiles_s16f_28['3'] = new Array ('_images/s16f_Links.gif', '_images/s16f_LinksMouseover.gif');

function image_on_s16f_28 (position) {
   var doc = eval("document.images16f_28" + position);
   doc.src = imageFiles_s16f_28[position][1];
}

function image_off_s16f_28 (position) {
   var doc = eval("document.images16f_28" + position);
   doc.src = imageFiles_s16f_28[position][0];
}