Fragment identifier
Fragment identifiers refer to a specific section in a resource. Fragment identifiers are not sent to web servers, so you cannot access this component of the URLs in your CGI scripts. Instead, the browser fetches a resource and then applies the fragment identifier to locate the appropriate section in the resource. For HTML documents, fragment identifiers refer to anchor tags within the document:
<a name="anchor" >Here is the content you're after...</a>
The following URL would request the full document and then scroll to the section marked by the anchor tag:
http://localhost/document.html#anchor
Web browsers generally jump to the bottom of the document if no anchor for the fragment identifier is found.
Partager