var imageFiles_3n_4 = new Array();
imageFiles_3n_4['0'] = new Array ('_images/3n_Interiors.gif', '_images/3n_InteriorsMouseover.gif');
imageFiles_3n_4['1'] = new Array ('_images/3n_Exteriors.gif', '_images/3n_ExteriorsMouseover.gif');

function image_on_3n_4 (position) {
   var doc = eval("document.image3n_4" + position);
   doc.src = imageFiles_3n_4[position][1];
}

function image_off_3n_4 (position) {
   var doc = eval("document.image3n_4" + position);
   doc.src = imageFiles_3n_4[position][0];
}