function writeNav(pageArr){
  document.write('<ul>');
  for (var page in pageArr) {
    pageName = pageArr[page].split('.')[0];
    pageNameOut = pageName.replace(/-/g, " ");
    outStr = '<li><a href="' + pageArr[page] + '">' + pageNameOut +'</a></li>';
    document.write(outStr);
  }
  document.write('</ul>');
}