Yes/No Attribute show custom static block in Magento

<?php

            // Extra code for showing is a pallet delivered product

                $att_is_pallet = $_product->getResource()->getAttribute('att_is_pallet')->getFrontend()->getValue($_product);

                if( isset( $att_is_pallet ) && !empty( $att_is_pallet ) && $att_is_pallet == "Yes" ) {

                    // New header block
                    $theBlock = 'block_pallet';
                    if(Mage::getModel('cms/block')->load($theBlock)->getIsActive() && $tempHTML = Mage::getModel('cms/block')->load($theBlock)->getContent() ) {
                        echo '<div class="is-pallet">';
                        echo Mage::getSingleton('widget/template_filter')->filter($tempHTML);
                        echo '</div>';
                    }

                }

            // /Extra code for showing is a pallet delivered product

            ?>