var imageFiles_20_70 = new Array();
imageFiles_20_70['0'] = new Array ('_images/20_Careers.gif', '_images/20_CareersMouseover.gif');
imageFiles_20_70['1'] = new Array ('_images/20_Contact_Us.gif', '_images/20_Contact_UsMouseover.gif');

function image_on_20_70 (position) {
   var doc = eval("document.image20_70" + position);
   doc.src = imageFiles_20_70[position][1];
}

function image_off_20_70 (position) {
   var doc = eval("document.image20_70" + position);
   doc.src = imageFiles_20_70[position][0];
}