var imageFiles_4j_373 = new Array();
imageFiles_4j_373['0'] = new Array ('_images/4j_Armstrong.gif', '_images/4j_ArmstrongMouseover.gif');

function image_on_4j_373 (position) {
   var doc = eval("document.image4j_373" + position);
   doc.src = imageFiles_4j_373[position][1];
}

function image_off_4j_373 (position) {
   var doc = eval("document.image4j_373" + position);
   doc.src = imageFiles_4j_373[position][0];
}