datepage.pl is a script that will go through the list of all your Web pages and match the ?last updated? string of your files with the ?last modified? date of those files and make updations whenever it finds discrepancy in these two fields. After updating any html files, this script should be run in UNIX. All $tags will be replaced by $update unless the value of both is the same, if there is a match between the two, then nothing will be changed.