I read many webpages. They said that I could use javascript:alert(document.lastModified); to find the last update of a site. I test at least 10 websites. Only the website that I made gives me the right information. All the others show the current time. E.g. "".
11 Answer
I do a site search in Google (e.g. site:pcornet.org ) and then find the page(s) I am looking for using keywords with the site search (e.g. site:pcornet.org intitle:"patient council"). The result will have a date next to it. I figure this is the date that Google reads that it was modified. It's better than having no date at all.
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