var imageFiles_bz_15 = new Array();
imageFiles_bz_15['0'] = new Array ('_images/bz_Perth.gif', '_images/bz_PerthMouseover.gif');

function image_on_bz_15 (position) {
   var doc = eval("document.imagebz_15" + position);
   doc.src = imageFiles_bz_15[position][1];
}

function image_off_bz_15 (position) {
   var doc = eval("document.imagebz_15" + position);
   doc.src = imageFiles_bz_15[position][0];
}