This is the way to get URL base on Magento Frameworks
[code]
<?php
echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_WEB);
// output: http://yoursite.com/
echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_JS);
// output: http://yoursite.com/js/
echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_LINK);
// output: http://yoursite.com/index.php/
echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA);
// output: http://yoursite.com/media/
echo Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_SKIN);
// output: http://yoursite.com/skin/</a>
?>
[/code]