你可能会看到这个页面,因为你使用了Back button while browsing a secure web site or application. Alternatively, you may have mistakenly bookmarked the web login form instead of the actual web site you wanted to bookmark or used a link created by somebody else who made the same mistake.

Left unchecked, this can cause errors on some browsers or result in you returning to the web site you tried to leave, so this page is presented instead.