var imageFiles_n_1 = new Array();
imageFiles_n_1['0'] = new Array ('_images/n_.gif', '_images/n_Mouseover.gif');

function image_on_n_1 (position) {
   var doc = eval("document.imagen_1" + position);
   doc.src = imageFiles_n_1[position][1];
}

function image_off_n_1 (position) {
   var doc = eval("document.imagen_1" + position);
   doc.src = imageFiles_n_1[position][0];
}