function chkdiv(divid){
	var chkid=document.getElementById(divid);
	if(chkid != null){return true; }
	else {return false; }	
}
if (chkdiv('fy')){
	document.getElementById('fy').innerHTML='上一篇：<a href="/News/2010-3/19565">语文北京版必修5《劝学》学案汇编 </a>  下一篇：<a href="/News/2010-3/19567">《劝学》学案大全 </a> ';
}