Menu link to block or div Is it possibile to link menu links to the div or block on the certain subpage? If yes what is the method to do this?
This is not completely straight forward. If you try to create and save a menu link like book/page#anchor-id, Drupal will give this error


  The path 'book/page' is either invalid or you do not have access
  to it.


You will need the node ID. Drupal wants the link to look like this: node/55#block-you-want.

The easiest way to do this is


Save the menu link without the anchor id. ex: /book/page
Drupal will create the menu link like this: node/55
Edit your menu link to: node/55#anchor-id. Save again.