// From http://www.jracademy.com/~jtucek/java.html
// I don't know why I'm using code from someone who uses
//   the words "JavaScript" and "Java" interchangeably.
//
lastmod = document.lastModified;
lastmoddate = Date.parse(lastmod);
if (lastmoddate == 0) {
     document.writeln("");
} else {
     document.writeln("" + lastmod);
}