var imageFiles_vn_4 = new Array();
imageFiles_vn_4['0'] = new Array ('_images/vn_HOME___.gif', '_images/vn_HOME___Mouseover.gif');
imageFiles_vn_4['1'] = new Array ('_images/vn_SITEMAP___.gif', '_images/vn_SITEMAP___Mouseover.gif');
imageFiles_vn_4['2'] = new Array ('_images/vn_GIFT_CERTIFICATES___.gif', '_images/vn_GIFT_CERTIFICATES___Mouseover.gif');

function image_on_vn_4 (position) {
   var doc = eval("document.imagevn_4" + position);
   doc.src = imageFiles_vn_4[position][1];
}

function image_off_vn_4 (position) {
   var doc = eval("document.imagevn_4" + position);
   doc.src = imageFiles_vn_4[position][0];
}