Automatic link-checkers

[William Van De Mark]

Hello:

A few days ago, I asked the listserv what criteria should be used to
update resource links and indexes. Someone mentioned automatic
link-checkers; can anyone give me some basic information about
link-checkers -- there pro's and con's, cost, efficacy? 

I would like to thank all of you for your quick and helpful assistance!


William Van De Mark
Syracuse University
Graduate MLS/ISDP
Long-distance program
billvdm at frontiernet.net