Note: If you set a region that isn’t available in the currently enabled theme, the block will be disabled. visibility: (optional) Initial value for the visibility flag, which tells how to interpret the ‘pages’ value. Drupal provides the following bitmask constants for defining cache granularity: DRUPAL_CACHE_PER_ROLE (default): The block can change depending on the roles the user viewing the page belongs to. DRUPAL_CACHE_PER_USER: The block can change depending on the user viewing the page. Video.js — HTML5 Video Player Build Status. jQuery Slider plugin — is easy to use and multifunctional jQuery plugin that supports any webkit based touch mobile devices such as iPhone/iPod/iPad and Android.