Joomla : how to get the url of a specific Menu itemID?

Question

Friends a newbie question.........I need help in getting the URL of a specific Menu itemID. The situation is like this:

I am running Joomla and asking for a user to

Answer 1

$itemid = JRequest::getVar('Itemid');
$application = JFactory::getApplication();
$menu = $application->getMenu();
$item = $menu->getItem($itemid);
$link = new JURI($item->link);
$link->setVar('ItemId', $itemid);

Source: http://forum.joomla.org/viewtopic.php?p=1836005