var imageFiles_74_31 = new Array();
imageFiles_74_31['0'] = new Array ('_images/74_home.gif', '_images/74_homeMouseover.gif');
imageFiles_74_31['1'] = new Array ('_images/74_contact_us.gif', '_images/74_contact_usMouseover.gif');

function image_on_74_31 (position) {
   var doc = eval("document.image74_31" + position);
   doc.src = imageFiles_74_31[position][1];
}

function image_off_74_31 (position) {
   var doc = eval("document.image74_31" + position);
   doc.src = imageFiles_74_31[position][0];
}