THIS is a simple JavaScript fragment that you can place at the end of ANY web document. Henceforth, the last modification date of your web document will automatically be maintained!

1. < script language="LiveScript" > 2. < !-- hide from old browsers 3. document.write("Behold! Last Modified: ", document.lastModified) 4. // end hiding -- > 5. < /script >
EXPLANATION:
-- the first line declares that you are using a JavaScript ("LiveScript" is really JavaScript).
-- the second and fourth lines looks just like the start and end of a standard "multiline comment". So the webbrowser is supposed to ignore everything in between these 2 lines. However, JavaScript does not ignore them.
-- indeed, the third line is a write command for your document. JavaScript will execute this write command. The 2 arguments for the write command are: (a) a literal string, and (b) the "lastModified" field of your document.