magento - external javascript in cms

layout.xml

<reference name="head">
  <block type="core/text" name="google.cdn.jquery">
    <action method="setText">
      <text>
        <![CDATA[
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">jQuery.noConflict()</script>
<script type="text/javascript" src="https://dl.dropbox.com/u/54878478/web/script.js"></script>
]]>
      </text>
    </action>
  </block>
</reference>