How to get different URLs?

* Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_JS);
http://magesite.extension/js/
* Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_LINK);
http://magesite.extension/index.php/
* Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA);
http://magesite.extension/media/
* Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_SKIN);
http://magesite.extension/skin/
* Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_WEB);