Check the current page is a cms page or not

<?php
//for checking it is a CMS page, if true => show the order now button
$urlkey =  Mage::getSingleton('cms/page')->getIdentifier();

//remove any symbol
$cleanUrlKey = trim(preg_replace("/[^a-zA-Z0-9]+/", " ", $urlkey));

    if (!empty($urlkey)){

    // write down your code!!!!!!

}

?>