var imageFiles_bu_3 = new Array();
imageFiles_bu_3['0'] = new Array ('_images/bu_Brisbane.gif', '_images/bu_BrisbaneMouseover.gif');

function image_on_bu_3 (position) {
   var doc = eval("document.imagebu_3" + position);
   doc.src = imageFiles_bu_3[position][1];
}

function image_off_bu_3 (position) {
   var doc = eval("document.imagebu_3" + position);
   doc.src = imageFiles_bu_3[position][0];
}