var imageFiles_em_25 = new Array();
imageFiles_em_25['0'] = new Array ('_images/em_Home.gif', '_images/em_HomeMouseover.gif');
imageFiles_em_25['1'] = new Array ('_images/em_Contact_Us.gif', '_images/em_Contact_UsMouseover.gif');
imageFiles_em_25['2'] = new Array ('_images/em_FAQ.gif', '_images/em_FAQMouseover.gif');

function image_on_em_25 (position) {
   var doc = eval("document.imageem_25" + position);
   doc.src = imageFiles_em_25[position][1];
}

function image_off_em_25 (position) {
   var doc = eval("document.imageem_25" + position);
   doc.src = imageFiles_em_25[position][0];
}