How can you detect when somebody else’s web page was last updated (or was changed)?
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How can you detect when somebody else’s web page was last updated (or was changed)?
The last changed time comes with the assumption that the web server provides accurate information. Dynamically generated pages will likely return the time the page was viewed. However, static pages are expected to reflect actual file modification time.
This is propagated through the HTTP header
Last-Modified. The Javascript trick by AZIRAR is clever and will display this value. Also, in Firefox going to Tools->Page Info will also display in the “Modified” field.