var imageFiles_20_28 = new Array();
imageFiles_20_28['0'] = new Array ('_images/20_Careers.gif', '_images/20_CareersMouseover.gif');
imageFiles_20_28['1'] = new Array ('_images/20_Contact_Us.gif', '_images/20_Contact_UsMouseover.gif');

function image_on_20_28 (position) {
   var doc = eval("document.image20_28" + position);
   doc.src = imageFiles_20_28[position][1];
}

function image_off_20_28 (position) {
   var doc = eval("document.image20_28" + position);
   doc.src = imageFiles_20_28[position][0];
}