/**
  * Checks if the input page ID is in the BE_USER webmounts
  *
  * @param	integer		Page ID to check
  * @return	boolean		True if OK. Cached results.
  */
 function isInWebMount($pid)
 {
     if (!isset($this->isInWebMount_Cache[$pid])) {
         $this->isInWebMount_Cache[$pid] = $this->BE_USER->isInWebMount($pid);
     }
     return $this->isInWebMount_Cache[$pid];
 }