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/2020-10/189977">2020-2021学年北师大版历史必修2课时分层作业+阶段综合测评 </a>  下一篇：<a href="/News/2020-10/189979">2020-2021学年北师大版历史必修2课件 </a> ';
}