var imageFiles_4n_397 = new Array();
imageFiles_4n_397['0'] = new Array ('_images/4n_Day___Night.gif', '_images/4n_Day___NightMouseover.gif');

function image_on_4n_397 (position) {
   var doc = eval("document.image4n_397" + position);
   doc.src = imageFiles_4n_397[position][1];
}

function image_off_4n_397 (position) {
   var doc = eval("document.image4n_397" + position);
   doc.src = imageFiles_4n_397[position][0];
}