if (chkdiv('placard')) {document.getElementById('placard').innerHTML='<P></P>\n<H4>&nbsp;&nbsp;&nbsp; 高等数学课件：</H4>\n<P><A href="http://v.youku.com/v_playlist/co00f738642o9p6.html">http://v.youku.com/v_playlist/co00f738642o9p6.html</A></P>\n<P>&nbsp;&nbsp;&nbsp;</P>\n<P>&nbsp;&nbsp;&nbsp;&nbsp; </P>';}