function relativelnk(fn) {
  var X, Y, sl, a, ra, link;
  ra = /:/;
  a = location.href.search(ra);
  if (a == 2)  X = 14;
  else  X = 7;
  sl = "\\";
  Y = location.href.lastIndexOf(sl) + 1;
  link = ''file:///'' + location.href.substring(X, Y) + fn;
  location.href = link;
}