var imageFiles_4j_304 = new Array();
imageFiles_4j_304['0'] = new Array ('_images/4j_Armstrong.gif', '_images/4j_ArmstrongMouseover.gif');

function image_on_4j_304 (position) {
   var doc = eval("document.image4j_304" + position);
   doc.src = imageFiles_4j_304[position][1];
}

function image_off_4j_304 (position) {
   var doc = eval("document.image4j_304" + position);
   doc.src = imageFiles_4j_304[position][0];
}