cmc-sales/views/documents/view.ctp

<?php
echo $javascript->link('ckeditor/ckeditor');
echo $javascript->link('ckeditor/adapters/jquery');

echo $javascript->link('document_add_edit');


switch($docType) {
    case 'quote':
	echo $this->element('document_quote_view');
    break;

    case 'invoice':
	echo "INVOICE!!";
    break;

    case 'purchaseOrder':
	echo 'Purchase OOOOORDER!!';

    break;
}

?>