var imageFiles_nt_9 = new Array();
imageFiles_nt_9['0'] = new Array ('_images/nt_Type_A.gif', '_images/nt_Type_AMouseover.gif');
imageFiles_nt_9['1'] = new Array ('_images/nt_Type_B.gif', '_images/nt_Type_BMouseover.gif');
imageFiles_nt_9['2'] = new Array ('_images/nt_Type_O.gif', '_images/nt_Type_OMouseover.gif');
imageFiles_nt_9['3'] = new Array ('_images/nt_Type_AB.gif', '_images/nt_Type_ABMouseover.gif');

function image_on_nt_9 (position) {
   var doc = eval("document.imagent_9" + position);
   doc.src = imageFiles_nt_9[position][1];
}

function image_off_nt_9 (position) {
   var doc = eval("document.imagent_9" + position);
   doc.src = imageFiles_nt_9[position][0];
}