Can you tell when the web page was originally created? When it was last updated?
Is this a topic on which it's important that you have up-to-date information (science, medicine, news, etc.) or one where it is not as important that information be recent (history, literature, etc.)?
Where to Look:
Look near the top and the bottom of the web page to see if any publication date, copyright date or "date last modified" is indicated.
Look for other indications that the page is kept current. Is there a "What's New" section?
In a book look on the back of the title page. Has the information been revised or updated? For a periodical look on the cover.
If statistical data or charts are included, be especially careful to notice what dates are represented there and when the data was collected or published.